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** In "[[Recap/TheTwilightZoneS3E84TheHunt The Hunt]]", an agent of the Devil is trying to lure a recently-deceased Hyder Simpson into entering Hell. Hyder's dog Rip growls, warning him not to enter, and he avoids the trap. Later, an angel remarks "...a man, well, he'll walk right into Hell with both eyes open. But not even the Devil can fool a dog!"
** In "[[Recap/TheTwilightZoneS3E91LittleGirlLost Little Girl Lost]]", the Millers' dog Mack starts barking after Tina vanishes. When he's let inside, Mack runs under the bed and finds her in the other dimension.
** In "[[Recap/TheTwilightZoneS3E91LittleGirlLost Little Girl Lost]]", the Millers' dog Mack starts barking after Tina vanishes. When he's let inside, Mack runs under the bed and finds her in the other dimension.
to:
** In "[[Recap/TheTwilightZoneS3E84TheHunt "[[Recap/TheTwilightZone1959S3E19TheHunt The Hunt]]", an agent of the Devil is trying to lure a recently-deceased Hyder Simpson into entering Hell. Hyder's dog Rip growls, warning him not to enter, and he avoids the trap. Later, an angel remarks "...a man, well, he'll walk right into Hell with both eyes open. But not even the Devil can fool a dog!"
** In"[[Recap/TheTwilightZoneS3E91LittleGirlLost "[[Recap/TheTwilightZone1959S3E26LittleGirlLost Little Girl Lost]]", the Millers' dog Mack starts barking after Tina vanishes. When he's let inside, Mack runs under the bed and finds her in the other dimension.
** In
Changed line(s) 74,76 (click to see context) from:
** In "Teacher's Aide", Miss Peters' dog Muffin barks at her after she is possessed by the spirit of a gargoyle because he can sense that there is something very wrong with her.
** In "Stranger in Possum Meadows", the Wilkins' dog Biff barks at Scout, who is an alien who intends to [[TheCollector take Danny back to his planet for study]]. Scout uses his power over animals to quieten Biff and later takes the dog as a specimen. Although he eventually releases Danny, Biff is not so lucky.
* ''Series/WarOfTheWorlds1988'': In "Amongst The Philistines", Kensington and Mrs. Pennyworth buy a dog just in time to have it react badly to Adrian, a few scenes before he turns out to be an alien. The trope is pretty blatant here, as the dog was introduced in this scene, and is never seen (alive) again.
** In "Stranger in Possum Meadows", the Wilkins' dog Biff barks at Scout, who is an alien who intends to [[TheCollector take Danny back to his planet for study]]. Scout uses his power over animals to quieten Biff and later takes the dog as a specimen. Although he eventually releases Danny, Biff is not so lucky.
* ''Series/WarOfTheWorlds1988'': In "Amongst The Philistines", Kensington and Mrs. Pennyworth buy a dog just in time to have it react badly to Adrian, a few scenes before he turns out to be an alien. The trope is pretty blatant here, as the dog was introduced in this scene, and is never seen (alive) again.
to:
** In "Teacher's Aide", "[[Recap/TheTwilightZone1985S1E7 Teacher's Aide]]", Miss Peters' dog Muffin barks at her after she is possessed by the spirit of a gargoyle because he can sense that there is something very wrong with her.
** In"Stranger "[[Recap/TheTwilightZone1985S3E17 Stranger in Possum Meadows", Meadows]]", the Wilkins' dog Biff barks at Scout, who is an alien who intends to [[TheCollector take Danny back to his planet for study]]. Scout uses his power over animals to quieten Biff and later takes the dog as a specimen. Although he eventually releases Danny, Biff is not so lucky.
* ''Series/WarOfTheWorlds1988'': In "AmongstThe the Philistines", Kensington and Mrs. Pennyworth buy a dog just in time to have it react badly to Adrian, a few scenes before he turns out to be an alien. The trope is pretty blatant here, as the dog was introduced in this scene, and is never seen (alive) again.
** In
* ''Series/WarOfTheWorlds1988'': In "Amongst
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* ''Series/PartOfMe'': After Elena kills Mónica, nobody at the manor thinks her as [[BitchInSheepsClothing anything but a dutiful niece]], except for Mónica's pet dog Pacho who can somehow feel Elena's KillingIntent towards Emiliana and keeps barking and roaring at her, and even tries to bite her.
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* ''Series/InterviewWithTheVampire2022'': Charlie's horse panics when it's near Claudia, so it can instinctively sense that she's a predator.
to:
* ''Series/InterviewWithTheVampire2022'': In "[[Recap/InterviewWithTheVampire2022S1E4TheRuthlessPursuitOfBloodWithAllA ...The Ruthless Pursuit of Blood with All a Child's Demanding]]", Charlie's horse panics when it's near Claudia, so it can instinctively sense that she's a predator.
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* ''Series/TheRising'': Dogs and birds can sense Neve as a ghost, something which nearly all humans are incapable of. She leads people to her body this way, since the birds circle around following her.
to:
* ''Series/TheRising'': Dogs and birds can sense Neve as a ghost, something which nearly all humans are incapable of. She leads people to her body this way, since the family dog follows her to the lake where birds circle around following her.above its location.
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* ''Series/TheRising'': Dogs and birds can sense Neve as a ghost, something which nearly all humans are incapable of. She leads people to her body this way, since the birds circle around following her.
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* ''Series/GameOfThrones'': The direwolves, with maybe Lady as the sole exception. Ghost alerts Jon to the wight in Castle Black, Summer giving Jojen a LickedByTheDog moment leads Bran to trust him, and Grey Wind is very restless in his kennel just before the Red Wedding begins.
to:
* ''Series/GameOfThrones'': The direwolves, Direwolves, with maybe Lady as the sole exception. Ghost alerts Jon to the wight in Castle Black, Summer giving Jojen a LickedByTheDog moment leads Bran to trust him, and Grey Wind is very restless in his kennel just before the Red Wedding begins.
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* In episode 6 of ''Series/BuffyTheVampireSlayer'', [[spoiler: Xander]]'s possession by a hyena spirit is detected by a pig. Justified in that [[spoiler: he later ate the pig.]]
-->'''Buffy:''' He scared the pig! ''*Giles looks at her*'' ...Well, he did...
* In Prue's penultimate appearance on ''Series/{{Charmed|1998}}'', she is changed into a dog so she can detect the cries of a Banshee (who, by the way, is a possessed Phoebe) and lead Piper to her.
-->'''Buffy:''' He scared the pig! ''*Giles looks at her*'' ...Well, he did...
* In Prue's penultimate appearance on ''Series/{{Charmed|1998}}'', she is changed into a dog so she can detect the cries of a Banshee (who, by the way, is a possessed Phoebe) and lead Piper to her.
to:
* In the ''Series/BuffyTheVampireSlayer'' episode 6 of ''Series/BuffyTheVampireSlayer'', [[spoiler: Xander]]'s "[[Recap/BuffyTheVampireSlayerS1E6ThePack The Pack]]", [[spoiler:Xander]]'s possession by a hyena spirit is detected by a pig. Justified in that [[spoiler: he [[spoiler:he later ate eats the pig.]]
pig]].
-->'''Buffy:''' He scared the pig!''*Giles ''[Giles looks at her*'' ...her]'' ...Well, he did...
* ''Series/Charmed1998'':
** In Prue's penultimateappearance on ''Series/{{Charmed|1998}}'', appearance, she is changed into a dog so she can detect the cries of a Banshee (who, by the way, is a possessed Phoebe) and lead Piper to her.
-->'''Buffy:''' He scared the pig!
* ''Series/Charmed1998'':
** In Prue's penultimate
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*** Tribbles can detect disguised Klingons.
to:
*** In "[[Recap/StarTrekS2E15TheTroubleWithTribbles The Trouble with Tribbles]]", Tribbles can detect disguised Klingons.
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** ''Series/StarTrekVoyager'': Inverted in the NoirEpisode. Tom Paris is accused of murder, and in the flashback scene the dog barks at him on sight. However the dog barks at all strangers, and [[MakeTheDogTestify Tuvok uses this to reveal the real killer]], who's familiar with the house despite claiming otherwise.
to:
** ''Series/StarTrekVoyager'': Inverted in the NoirEpisode."[[Recap/StarTrekVoyagerS1E7ExPostFacto Ex Post Facto]]". Tom Paris is accused of murder, and in the flashback scene the dog barks at him on sight. However However, the dog barks at all strangers, and [[MakeTheDogTestify Tuvok uses this to reveal the real killer]], who's familiar with the house despite claiming otherwise.
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** InvokedTrope when Sam used this to explain why a dog kept barking at a house where a supernatural event had happened. It was never proved on screen, though.
** Subverted in "All Dogs Go To Heaven". Sam and Dean are interrogating a man suspected of being a shapeshifter. The moment he enters the room, his own dog barks at him and the brothers exchange a MeaningfulLook. Turns out the dog is the shapeshifter, and the man his next victim.
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
** Subverted in "All Dogs Go To Heaven". Sam and Dean are interrogating a man suspected of being a shapeshifter. The moment he enters the room, his own dog barks at him and the brothers exchange a MeaningfulLook. Turns out the dog is the shapeshifter, and the man his next victim.
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
to:
** InvokedTrope {{Invoked|Trope}} when Sam used uses this trope to explain why a dog kept keeps barking at a house where a supernatural event had has happened. It was It's never proved on screen, though.
** A subtle version in "[[Recap/SupernaturalS06E05LiveFreeOrTwiHard Live Free or Twi Hard]]". When Dean is infected with vampire blood and is [[WarmBloodbagsAreEverywhere trying not to bite]] his love interest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
** Subverted in"All "[[Recap/SupernaturalS06E08AllDogsGoToHeaven All Dogs Go To Heaven".to Heaven]]". Sam and Dean are interrogating a man suspected of being a shapeshifter. The moment he enters the room, his own dog barks at him and the brothers exchange a MeaningfulLook. Turns out the dog is the shapeshifter, and the man his next victim.
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.victim.
** A subtle version in "[[Recap/SupernaturalS06E05LiveFreeOrTwiHard Live Free or Twi Hard]]". When Dean is infected with vampire blood and is [[WarmBloodbagsAreEverywhere trying not to bite]] his love interest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
** Subverted in
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
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** [[SubvertedTrope Subverted]] in "They're Everywhere" when the cat appears to hiss at Piper's new love interest. She worries this is a sign that he's secretly a warlock, but then it turns out the cat was just hissing at a hornet's nest on the wall behind him.
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* ''Series/TheOuterLimits1995'': In "Stranded", Kevin Buchanan's German Shepherd Cody takes an instant dislike to Tyr'Nar while Kevin is completely taken in by his manipulations. Tyr'Nar solves the problem and satisfies his appetite by eating Cody.
to:
* ''Series/TheOuterLimits1995'': In "Stranded", "[[Recap/TheOuterLimits1995S5E19Stranded Stranded]]", Kevin Buchanan's German Shepherd Cody takes an instant dislike to Tyr'Nar while Kevin is completely taken in by his manipulations. Tyr'Nar solves the problem and satisfies his appetite by eating Cody.
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* In ''Series/TheXFiles'', "Terma", Soviet assassin Peskow manages to upset all the horses in a stable by calmly observing one of them. Though for all we know it was part of his plan.
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* ''Series/TheXFiles'': In ''Series/TheXFiles'', "Terma", "[[Recap/TheXFilesS04E09Terma Terma]]", Soviet assassin Peskow manages to upset all the horses in a stable by calmly observing one of them. Though for all we know it was part of his plan.plan.
----
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* Parodied in ''Series/ThirtyRock''. Tracy attempted to invoke this trope with his Rottweiler by training it to attack white-colored creatures, his logic being that [[InsaneTrollLogic since ghosts are typically depicted as pale white it would make the dog attack ghosts]]. The actual result was a dog that attacks white people on sight, including poor Kenneth who gets chased across New York by the thing.
* On ''Series/AllMyChildren'', Harold the dog is the only one to sense who psycho Janet Green really is. Both when she disguises herself as her sister Natalie and when she returns to town under a new identity after MagicPlasticSurgery, he is shown relentlessly barking and growling at her.
* Subverted in ''Series/BattlestarGalactica2003'', when Cylon D'Anna is quite pleased that Jake the dog doesn't react with hostility to her. Of course, little does she know that Jake serves LaResistance in another way.
** Played straight in the [[Series/BattlestarGalactica1978 original]] series with robot-[[CallARabbitASmeerp Daggit]] Muffet, who could "sniff" out Cylons and cannibalistic aliens.
* A light version of this appears in ''Series/{{NCIS}}'' when Kate is reluctant to adopt a dog whose owner has died... until it growls at her HandsomeLech colleague who's always making unwelcome moves on her.
** In the episode "Seek", Dex the military dog starts growling the moment he realizes he's in the presence of the man who murdered his handler in the opening sequence.
* In episode 6 of ''Series/BuffyTheVampireSlayer'', [[spoiler: Xander]]'s possession by a hyena spirit is detected by a pig. Justified in that [[spoiler: he later ate the pig.]]
-->'''Buffy:''' He scared the pig! ''*Giles looks at her*'' ...Well, he did...
* In Prue's penultimate appearance on ''Series/{{Charmed|1998}}'', she is changed into a dog so she can detect the cries of a Banshee (who, by the way, is a possessed Phoebe) and lead Piper to her.
** They also used to have an Evil Detecting '''Cat''' which hisses at and has been known to run from evil beings and demons, especially those trying to fool their way into the Halliwell household by appearing mortal. [[spoiler:The "cat" comes back in a later episode, revealing herself to have actually been a human in cat form the entire time.]]
* ''Series/Daredevil2015'': In Season 3 Episode 11, the NYPD and FBI bring search dogs into the church to look for Matt and Karen, who are hiding in the basement. One of the dogs comes up to [[DirtyCop Dex]], whose scent is all over the place from the attack he just committed on the church, prompting him to say, [[LampshadeHanging "Not me, fellas. The bad guys."]]
* On ''Series/{{Dexter}}'' (and [[Literature/{{Dexter}} the novels]] it's (loosely) based on), animals in general and dogs in particular can't tolerate the presence of the main character (a sociopathic serial killer). It's so bad that when he tried to keep a pet turtle it starved to death rather than come out of its shell when he fed it.
** There's a dog that seems rather fond of Trinity in the fourth season, though.
* In ''Series/{{Dickensian}}'', [[Literature/GreatExpectations Miss Havisham]]'s dog growls whenever Compeyson approaches. [[spoiler:Eventually, he gets rid of the dog by throwing it in the river in a sack.]]
* On ''Series/TheDukesOfHazzard'', Roscoe's dog, Flash, is very quiet and only barks at Boss Hogg. This became a plot point when Boss Hogg's [[EvilTwin ''good'' twin]] came to town, and Flash was used to prevent Boss from stealing his inheritance.
* In ''Series/TheEvent'', dogs bark at the aliens, who are otherwise indistinguishable from humans.
* In the LifetimeMovieOfTheWeek ''Fatal Lessons: The Good Teacher'', the ''not''-good teacher is greeted with hostility by the family dog when she arrives to act as a nanny for the children (and later a cook). [[spoiler: Her overall goal is to kill the wife and sexually torture the husband.]] The teacher, being something of a MadScientist, kills the dog by injecting it with a poison she concocted herself; she then buries the corpse and allows the family to think the dog ran away.
* Happened several times in ''Series/ForeverKnight''. A dog and a horse both reacted negatively to vampiric presences.
* In one episode ''Series/{{Frasier}}'' invites his [[IceQueen ex-wife Lilith]] to Thanksgiving dinner at the last minute. Shortly afterwards Daphne returns home and has to drag Eddie through the front door by his leash.
-->'''Daphne:''' Well, he was perfectly fine until a block from here. Then he started whining and trembling, like he senses an earthquake or a dark force or- hello, Lilith - a vortex of evil. ''[pauses as she realises what she just said]''
* ''Series/GameOfThrones'': The direwolves, with maybe Lady as the sole exception. Ghost alerts Jon to the wight in Castle Black, Summer giving Jojen a LickedByTheDog moment leads Bran to trust him, and Grey Wind is very restless in his kennel just before the Red Wedding begins.
* ''Series/TheGoesWrongShow'': The episode "90 Degrees" has Ruffles, the family dog, who would growl whenever he was near [[GoldDigger Renee]] (Vanessa) or [[{{Greed}} Barbara]] (Sandra). Shame that said dog was voiced by [[LargeHam Robert]].
* On ''Series/TheGoldenGirls'', Blanche discovers her current boyfriend cavorting with Rose's sister when the dog that they've been watching for a neighbor comes out into the living room carrying the man's pants. After being told off by an infuriated Blanche, the abashed man goes to get his pants and leave, only to be barked at and chased out of the house by the equally angry dog.
* ''Series/{{Heroes}}'':
** Played with. Mr. Muggles always seems to know which characters shouldn't be trusted, but being that he's a tiny Pomeranian, there's not much he can do and he seemed to like a disguised Sylar and Revenge!Ted.
** Played more straight in a deleted scene when Sylar has Claire trapped in a closet and Mr. Muggles goes mad barking at him but gets flicked out the doggie door for his trouble.
* ''Series/{{Himmelsdalen}}'': Luck, a dog in the sanitorium, barks at Siri but likes Helena. Siri, it turns out, is a dangerous sociopath, quite unlike Helena. Luck also dislikes Raymond, another dangerous sociopath.
* In ''Series/HotelBeauSejour'', horses can apparently sense Kato even though most humans can't see her. When she gets BuriedAlive, the nearby horses start pawing at the spot where she was buried, alerting the farmers.
* ''Series/InterviewWithTheVampire2022'': Charlie's horse panics when it's near Claudia, so it can instinctively sense that she's a predator.
* Subverted all the time on ''Series/ItTakesAThief2005'' -- the big, mean-looking dog the family owns as a thief deterrent is much more likely to approach the thief in a friendly manner or run away whimpering.
* ''Series/KolchakTheNightStalker''. An evil pyromaniac ghost kills a man in his apartment through SpontaneousHumanCombustion. When the ghost leaves the apartment, a dog in the corridor outside detects his presence and starts barking like crazy.
* At the end of the ''Series/LegendsOfTomorrow'' episode "The Eggplant, the Witch and the Wardrobe," [[spoiler: a dog starts snarling at Ray, who's surprised because animals usually like him. He then walks off whistling [[DemonLordsAndArchDevils Neron]]'s ''{{leitmotif}}'', revealing that he's fallen victim to DemonicPossession]].
* ''Series/MADtv'' had the one-off "[[https://youtu.be/GLSlGmVrmuM Smith Comma John]] -- [[HughMann Human Being for President]]" ads, one of which had him introduce Nilly, a golden lab who barked every time he tried to pet her.
* ''Series/TheMagicians2016'': Variant. When Alice finds out she's being tracked by a lamprey, she buys a cat, paying special attention to its age, and starts carrying it around in a cage everywhere she goes. When the lamprey gets near, it starts hissing until it '''explodes''' in a bloody mess. She drops the cage and runs, leaving Quentin and the others to talk to a very confused cop.
-->'''Quentin:''' Sorry, officer, a friend's cat was sick... and exploded. You know, like they do.
* Not really evil detecting, but in ''Series/MyOwnWorstEnemy'' the family dog is the only one who can tell when its owner's hard-edged split personality takes over.
* In ''Series/TheNanny,'' while C.C. wasn't evil (supposedly), she was a full-blooded RichBitch, and her Pomeranian Chester had no trouble letting her know it. He would snarl and growl every time she was anywhere near him, while being perfectly friendly to everybody else in the house. In real life, [[MeanCharacterNiceActor despite Lauren Lane (C.C.) being a very sweet and pleasant person]], Chester was Creator/FranDrescher's real life dog, and was so fiercely loyal to her that any time Lane picked up the dog, he would just naturally growl, so they wrote it into the story that way.
* On ''Series/OnceUponATime'', Dr. Hopper's dog, Pongo, is a well-behaved and sweet Dalmatian. But once Regina, the former Evil Queen, waltzes into their office, the dog starts growling at her and gets frozen for his trouble. [[spoiler:That's because it's really Regina's mother Cora in disguise as her daughter. Pongo was previously shown being well-behaved around the real Regina.]]
* ''Series/TheOuterLimits1995'': In "Stranded", Kevin Buchanan's German Shepherd Cody takes an instant dislike to Tyr'Nar while Kevin is completely taken in by his manipulations. Tyr'Nar solves the problem and satisfies his appetite by eating Cody.
* Subverted in ''Series/PrisonBreak''. The dog begins barking at Haywire and then '''follows him down the road''' after he steals supplies from the camping store. It turns out the dog wanted the jerky in his backpack.
* Invoked in ''Series/{{Psych}}''. Shawn is trying to fake a haunting in a house, and uses an electronic silent dog whistle to make a homeowner's dog start barking angrily. He then claims the dog is sensing an evil presence.
* In ''Series/{{Reaper}}'', the first sign that TheDevil has taken possession of Sam's soul is that dogs suddenly ''hate'' him.
* In the TV adaptation of ''Series/{{Scream}}'', the opening victim Nina threatens the killer (whom she thinks is her boyfriend Tyler playing a prank on her) by telling him that she has a "trained attack Pomeranian, and she will gut you on command!" Her little dog does bark at the killer from behind the glass, but it does Nina little good when she's being stabbed to death.
* ''Series/{{Smallville}}'':
** "Labyrinth": Shelby starts to bark in the presence of a [[spoiler:phantom]].
** "Veritas": Shelby starts barking when [[spoiler:Brainiac]] drops by.
* ''Series/{{Spaced}}'': Parodied. A subplot concerns an anarchist who trained a dog to sense and attack rich people... Then he won the lottery and was ''immediately'' mauled by his own dog.
* ''Franchise/StarTrek'':
** ''Series/StarTrekTheOriginalSeries'':
*** "[[Recap/StarTrekS1E1TheManTrap The Man Trap]]" has an evil-detecting ''plant'' -- an animated alien plant in the botany lab whines and shrinks away from the [[OurVampiresAreDifferent salt vampire]] [[{{Doppelganger}} disguised as a human]].
*** Tribbles can detect disguised Klingons.
** ''Series/StarTrekEnterprise'': Captain Archer's dog barks when a web-like alien passes in the conduits overhead. He also becomes spooked just before a NegativeSpaceWedgie manifests inside ''Enterprise'' herself.
** ''Series/StarTrekVoyager'': Inverted in the NoirEpisode. Tom Paris is accused of murder, and in the flashback scene the dog barks at him on sight. However the dog barks at all strangers, and [[MakeTheDogTestify Tuvok uses this to reveal the real killer]], who's familiar with the house despite claiming otherwise.
* ''Series/{{Supernatural}}'':
** InvokedTrope when Sam used this to explain why a dog kept barking at a house where a supernatural event had happened. It was never proved on screen, though.
** Subverted in "All Dogs Go To Heaven". Sam and Dean are interrogating a man suspected of being a shapeshifter. The moment he enters the room, his own dog barks at him and the brothers exchange a MeaningfulLook. Turns out the dog is the shapeshifter, and the man his next victim.
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
* ''Series/SweetHome2020'': Bom the Pomeranian is usually reliable for noticing danger.
* In ''Series/TalesOfTheGoldMonkey'', Jake's one-eyed dog Jack growls or barks at any impostor, including the (unknown-to-the-characters) resident Nazi spy.
* ''Series/TerminatorTheSarahConnorChronicles'':
** Dogs detecting Cameron as a Terminator react with dread.
--->'''Carlos:''' Something about your friend I should know?\\
'''Sarah:''' Cat person.
** PlayedForLaughs when Cameron goes to a computer convention and a robot dog barks at her.
* In the first episode of ''Series/TrueBlood'', a dog barks at resident FriendlyNeighborhoodVampire Bill Compton.
* ''Series/TheTwilightZone1959'':
** In "[[Recap/TheTwilightZoneS3E84TheHunt The Hunt]]", an agent of the Devil is trying to lure a recently-deceased Hyder Simpson into entering Hell. Hyder's dog Rip growls, warning him not to enter, and he avoids the trap. Later, an angel remarks "...a man, well, he'll walk right into Hell with both eyes open. But not even the Devil can fool a dog!"
** In "[[Recap/TheTwilightZoneS3E91LittleGirlLost Little Girl Lost]]", the Millers' dog Mack starts barking after Tina vanishes. When he's let inside, Mack runs under the bed and finds her in the other dimension.
* ''Series/TheTwilightZone1985'':
** In "Teacher's Aide", Miss Peters' dog Muffin barks at her after she is possessed by the spirit of a gargoyle because he can sense that there is something very wrong with her.
** In "Stranger in Possum Meadows", the Wilkins' dog Biff barks at Scout, who is an alien who intends to [[TheCollector take Danny back to his planet for study]]. Scout uses his power over animals to quieten Biff and later takes the dog as a specimen. Although he eventually releases Danny, Biff is not so lucky.
* ''Series/WarOfTheWorlds1988'': In "Amongst The Philistines", Kensington and Mrs. Pennyworth buy a dog just in time to have it react badly to Adrian, a few scenes before he turns out to be an alien. The trope is pretty blatant here, as the dog was introduced in this scene, and is never seen (alive) again.
* Inverted in ''Series/WolfLikeMe''. A brief gag indicates that dogs can sense that Mary [[spoiler: is a werewolf]], but rather than fear and/or anger they're ''intrigued'', breaking from their leashes in the park to walk with her. On the other hand, it's played straight with Sarah's cat, who hisses and yowls at the sight of Mary.
* ''Series/XenaWarriorPrincess'' had Argo, her trusty horse that could tell something was wrong when [[GrandTheftMe Xena's body was hi-jacked by Callisto's spirit]].
* In ''Series/TheXFiles'', "Terma", Soviet assassin Peskow manages to upset all the horses in a stable by calmly observing one of them. Though for all we know it was part of his plan.
* On ''Series/AllMyChildren'', Harold the dog is the only one to sense who psycho Janet Green really is. Both when she disguises herself as her sister Natalie and when she returns to town under a new identity after MagicPlasticSurgery, he is shown relentlessly barking and growling at her.
* Subverted in ''Series/BattlestarGalactica2003'', when Cylon D'Anna is quite pleased that Jake the dog doesn't react with hostility to her. Of course, little does she know that Jake serves LaResistance in another way.
** Played straight in the [[Series/BattlestarGalactica1978 original]] series with robot-[[CallARabbitASmeerp Daggit]] Muffet, who could "sniff" out Cylons and cannibalistic aliens.
* A light version of this appears in ''Series/{{NCIS}}'' when Kate is reluctant to adopt a dog whose owner has died... until it growls at her HandsomeLech colleague who's always making unwelcome moves on her.
** In the episode "Seek", Dex the military dog starts growling the moment he realizes he's in the presence of the man who murdered his handler in the opening sequence.
* In episode 6 of ''Series/BuffyTheVampireSlayer'', [[spoiler: Xander]]'s possession by a hyena spirit is detected by a pig. Justified in that [[spoiler: he later ate the pig.]]
-->'''Buffy:''' He scared the pig! ''*Giles looks at her*'' ...Well, he did...
* In Prue's penultimate appearance on ''Series/{{Charmed|1998}}'', she is changed into a dog so she can detect the cries of a Banshee (who, by the way, is a possessed Phoebe) and lead Piper to her.
** They also used to have an Evil Detecting '''Cat''' which hisses at and has been known to run from evil beings and demons, especially those trying to fool their way into the Halliwell household by appearing mortal. [[spoiler:The "cat" comes back in a later episode, revealing herself to have actually been a human in cat form the entire time.]]
* ''Series/Daredevil2015'': In Season 3 Episode 11, the NYPD and FBI bring search dogs into the church to look for Matt and Karen, who are hiding in the basement. One of the dogs comes up to [[DirtyCop Dex]], whose scent is all over the place from the attack he just committed on the church, prompting him to say, [[LampshadeHanging "Not me, fellas. The bad guys."]]
* On ''Series/{{Dexter}}'' (and [[Literature/{{Dexter}} the novels]] it's (loosely) based on), animals in general and dogs in particular can't tolerate the presence of the main character (a sociopathic serial killer). It's so bad that when he tried to keep a pet turtle it starved to death rather than come out of its shell when he fed it.
** There's a dog that seems rather fond of Trinity in the fourth season, though.
* In ''Series/{{Dickensian}}'', [[Literature/GreatExpectations Miss Havisham]]'s dog growls whenever Compeyson approaches. [[spoiler:Eventually, he gets rid of the dog by throwing it in the river in a sack.]]
* On ''Series/TheDukesOfHazzard'', Roscoe's dog, Flash, is very quiet and only barks at Boss Hogg. This became a plot point when Boss Hogg's [[EvilTwin ''good'' twin]] came to town, and Flash was used to prevent Boss from stealing his inheritance.
* In ''Series/TheEvent'', dogs bark at the aliens, who are otherwise indistinguishable from humans.
* In the LifetimeMovieOfTheWeek ''Fatal Lessons: The Good Teacher'', the ''not''-good teacher is greeted with hostility by the family dog when she arrives to act as a nanny for the children (and later a cook). [[spoiler: Her overall goal is to kill the wife and sexually torture the husband.]] The teacher, being something of a MadScientist, kills the dog by injecting it with a poison she concocted herself; she then buries the corpse and allows the family to think the dog ran away.
* Happened several times in ''Series/ForeverKnight''. A dog and a horse both reacted negatively to vampiric presences.
* In one episode ''Series/{{Frasier}}'' invites his [[IceQueen ex-wife Lilith]] to Thanksgiving dinner at the last minute. Shortly afterwards Daphne returns home and has to drag Eddie through the front door by his leash.
-->'''Daphne:''' Well, he was perfectly fine until a block from here. Then he started whining and trembling, like he senses an earthquake or a dark force or- hello, Lilith - a vortex of evil. ''[pauses as she realises what she just said]''
* ''Series/GameOfThrones'': The direwolves, with maybe Lady as the sole exception. Ghost alerts Jon to the wight in Castle Black, Summer giving Jojen a LickedByTheDog moment leads Bran to trust him, and Grey Wind is very restless in his kennel just before the Red Wedding begins.
* ''Series/TheGoesWrongShow'': The episode "90 Degrees" has Ruffles, the family dog, who would growl whenever he was near [[GoldDigger Renee]] (Vanessa) or [[{{Greed}} Barbara]] (Sandra). Shame that said dog was voiced by [[LargeHam Robert]].
* On ''Series/TheGoldenGirls'', Blanche discovers her current boyfriend cavorting with Rose's sister when the dog that they've been watching for a neighbor comes out into the living room carrying the man's pants. After being told off by an infuriated Blanche, the abashed man goes to get his pants and leave, only to be barked at and chased out of the house by the equally angry dog.
* ''Series/{{Heroes}}'':
** Played with. Mr. Muggles always seems to know which characters shouldn't be trusted, but being that he's a tiny Pomeranian, there's not much he can do and he seemed to like a disguised Sylar and Revenge!Ted.
** Played more straight in a deleted scene when Sylar has Claire trapped in a closet and Mr. Muggles goes mad barking at him but gets flicked out the doggie door for his trouble.
* ''Series/{{Himmelsdalen}}'': Luck, a dog in the sanitorium, barks at Siri but likes Helena. Siri, it turns out, is a dangerous sociopath, quite unlike Helena. Luck also dislikes Raymond, another dangerous sociopath.
* In ''Series/HotelBeauSejour'', horses can apparently sense Kato even though most humans can't see her. When she gets BuriedAlive, the nearby horses start pawing at the spot where she was buried, alerting the farmers.
* ''Series/InterviewWithTheVampire2022'': Charlie's horse panics when it's near Claudia, so it can instinctively sense that she's a predator.
* Subverted all the time on ''Series/ItTakesAThief2005'' -- the big, mean-looking dog the family owns as a thief deterrent is much more likely to approach the thief in a friendly manner or run away whimpering.
* ''Series/KolchakTheNightStalker''. An evil pyromaniac ghost kills a man in his apartment through SpontaneousHumanCombustion. When the ghost leaves the apartment, a dog in the corridor outside detects his presence and starts barking like crazy.
* At the end of the ''Series/LegendsOfTomorrow'' episode "The Eggplant, the Witch and the Wardrobe," [[spoiler: a dog starts snarling at Ray, who's surprised because animals usually like him. He then walks off whistling [[DemonLordsAndArchDevils Neron]]'s ''{{leitmotif}}'', revealing that he's fallen victim to DemonicPossession]].
* ''Series/MADtv'' had the one-off "[[https://youtu.be/GLSlGmVrmuM Smith Comma John]] -- [[HughMann Human Being for President]]" ads, one of which had him introduce Nilly, a golden lab who barked every time he tried to pet her.
* ''Series/TheMagicians2016'': Variant. When Alice finds out she's being tracked by a lamprey, she buys a cat, paying special attention to its age, and starts carrying it around in a cage everywhere she goes. When the lamprey gets near, it starts hissing until it '''explodes''' in a bloody mess. She drops the cage and runs, leaving Quentin and the others to talk to a very confused cop.
-->'''Quentin:''' Sorry, officer, a friend's cat was sick... and exploded. You know, like they do.
* Not really evil detecting, but in ''Series/MyOwnWorstEnemy'' the family dog is the only one who can tell when its owner's hard-edged split personality takes over.
* In ''Series/TheNanny,'' while C.C. wasn't evil (supposedly), she was a full-blooded RichBitch, and her Pomeranian Chester had no trouble letting her know it. He would snarl and growl every time she was anywhere near him, while being perfectly friendly to everybody else in the house. In real life, [[MeanCharacterNiceActor despite Lauren Lane (C.C.) being a very sweet and pleasant person]], Chester was Creator/FranDrescher's real life dog, and was so fiercely loyal to her that any time Lane picked up the dog, he would just naturally growl, so they wrote it into the story that way.
* On ''Series/OnceUponATime'', Dr. Hopper's dog, Pongo, is a well-behaved and sweet Dalmatian. But once Regina, the former Evil Queen, waltzes into their office, the dog starts growling at her and gets frozen for his trouble. [[spoiler:That's because it's really Regina's mother Cora in disguise as her daughter. Pongo was previously shown being well-behaved around the real Regina.]]
* ''Series/TheOuterLimits1995'': In "Stranded", Kevin Buchanan's German Shepherd Cody takes an instant dislike to Tyr'Nar while Kevin is completely taken in by his manipulations. Tyr'Nar solves the problem and satisfies his appetite by eating Cody.
* Subverted in ''Series/PrisonBreak''. The dog begins barking at Haywire and then '''follows him down the road''' after he steals supplies from the camping store. It turns out the dog wanted the jerky in his backpack.
* Invoked in ''Series/{{Psych}}''. Shawn is trying to fake a haunting in a house, and uses an electronic silent dog whistle to make a homeowner's dog start barking angrily. He then claims the dog is sensing an evil presence.
* In ''Series/{{Reaper}}'', the first sign that TheDevil has taken possession of Sam's soul is that dogs suddenly ''hate'' him.
* In the TV adaptation of ''Series/{{Scream}}'', the opening victim Nina threatens the killer (whom she thinks is her boyfriend Tyler playing a prank on her) by telling him that she has a "trained attack Pomeranian, and she will gut you on command!" Her little dog does bark at the killer from behind the glass, but it does Nina little good when she's being stabbed to death.
* ''Series/{{Smallville}}'':
** "Labyrinth": Shelby starts to bark in the presence of a [[spoiler:phantom]].
** "Veritas": Shelby starts barking when [[spoiler:Brainiac]] drops by.
* ''Series/{{Spaced}}'': Parodied. A subplot concerns an anarchist who trained a dog to sense and attack rich people... Then he won the lottery and was ''immediately'' mauled by his own dog.
* ''Franchise/StarTrek'':
** ''Series/StarTrekTheOriginalSeries'':
*** "[[Recap/StarTrekS1E1TheManTrap The Man Trap]]" has an evil-detecting ''plant'' -- an animated alien plant in the botany lab whines and shrinks away from the [[OurVampiresAreDifferent salt vampire]] [[{{Doppelganger}} disguised as a human]].
*** Tribbles can detect disguised Klingons.
** ''Series/StarTrekEnterprise'': Captain Archer's dog barks when a web-like alien passes in the conduits overhead. He also becomes spooked just before a NegativeSpaceWedgie manifests inside ''Enterprise'' herself.
** ''Series/StarTrekVoyager'': Inverted in the NoirEpisode. Tom Paris is accused of murder, and in the flashback scene the dog barks at him on sight. However the dog barks at all strangers, and [[MakeTheDogTestify Tuvok uses this to reveal the real killer]], who's familiar with the house despite claiming otherwise.
* ''Series/{{Supernatural}}'':
** InvokedTrope when Sam used this to explain why a dog kept barking at a house where a supernatural event had happened. It was never proved on screen, though.
** Subverted in "All Dogs Go To Heaven". Sam and Dean are interrogating a man suspected of being a shapeshifter. The moment he enters the room, his own dog barks at him and the brothers exchange a MeaningfulLook. Turns out the dog is the shapeshifter, and the man his next victim.
** A subtle version in "Live Free or Twi Hard". When Dean is infected with vampire blood and is [[WarmBloodBagsAreEverywhere trying not to bite]] his LoveInterest, a dog can be heard barking somewhere in the distance as he starts to go all fang-y.
* ''Series/SweetHome2020'': Bom the Pomeranian is usually reliable for noticing danger.
* In ''Series/TalesOfTheGoldMonkey'', Jake's one-eyed dog Jack growls or barks at any impostor, including the (unknown-to-the-characters) resident Nazi spy.
* ''Series/TerminatorTheSarahConnorChronicles'':
** Dogs detecting Cameron as a Terminator react with dread.
--->'''Carlos:''' Something about your friend I should know?\\
'''Sarah:''' Cat person.
** PlayedForLaughs when Cameron goes to a computer convention and a robot dog barks at her.
* In the first episode of ''Series/TrueBlood'', a dog barks at resident FriendlyNeighborhoodVampire Bill Compton.
* ''Series/TheTwilightZone1959'':
** In "[[Recap/TheTwilightZoneS3E84TheHunt The Hunt]]", an agent of the Devil is trying to lure a recently-deceased Hyder Simpson into entering Hell. Hyder's dog Rip growls, warning him not to enter, and he avoids the trap. Later, an angel remarks "...a man, well, he'll walk right into Hell with both eyes open. But not even the Devil can fool a dog!"
** In "[[Recap/TheTwilightZoneS3E91LittleGirlLost Little Girl Lost]]", the Millers' dog Mack starts barking after Tina vanishes. When he's let inside, Mack runs under the bed and finds her in the other dimension.
* ''Series/TheTwilightZone1985'':
** In "Teacher's Aide", Miss Peters' dog Muffin barks at her after she is possessed by the spirit of a gargoyle because he can sense that there is something very wrong with her.
** In "Stranger in Possum Meadows", the Wilkins' dog Biff barks at Scout, who is an alien who intends to [[TheCollector take Danny back to his planet for study]]. Scout uses his power over animals to quieten Biff and later takes the dog as a specimen. Although he eventually releases Danny, Biff is not so lucky.
* ''Series/WarOfTheWorlds1988'': In "Amongst The Philistines", Kensington and Mrs. Pennyworth buy a dog just in time to have it react badly to Adrian, a few scenes before he turns out to be an alien. The trope is pretty blatant here, as the dog was introduced in this scene, and is never seen (alive) again.
* Inverted in ''Series/WolfLikeMe''. A brief gag indicates that dogs can sense that Mary [[spoiler: is a werewolf]], but rather than fear and/or anger they're ''intrigued'', breaking from their leashes in the park to walk with her. On the other hand, it's played straight with Sarah's cat, who hisses and yowls at the sight of Mary.
* ''Series/XenaWarriorPrincess'' had Argo, her trusty horse that could tell something was wrong when [[GrandTheftMe Xena's body was hi-jacked by Callisto's spirit]].
* In ''Series/TheXFiles'', "Terma", Soviet assassin Peskow manages to upset all the horses in a stable by calmly observing one of them. Though for all we know it was part of his plan.
