History Main / OncePerEpisode

* On ''Noozles'', Osgood the lizard pops up out of nowhere at least once an episode to comment on what is going on.

* Almost (like 99.99%) all of the Scully & Mulder-centric episodes of [[TheX-Files The X-Files]] features Mulder suggesting something supernatural, Scully acting like his suggestion is completely ridiculous and "proving" so scientifically. Mulder is right in the end, 99.99% of the time, though Scully never admits it. Mulder actually points this out in season 6's "Field Trip".

* Pretty much every ''Pokemon'' game has one fisherman who fights you with 6 low leveled Magikarp

* Every {{Batman}} movie has someone new learning his secret identity. (In BatmanForever, two someones.) In {{Batman: The Dark Knight}}, there's no sidekick, and the love interest is the same as the last movie [[GirlOfTheWeek for the first time]], so they make do with revealing it to some accountant who [[TooDumbToLive tries to]] [[BullyingADragon blackmail Batman]].

* Every {{Batman}} movie has someone new learning his secret identity. (In BatmanForever, two someones.) In {{Batman: The Dark Knight}}, there's no sidekick, and the love interest is the same as the last movie [[GirlOfTheWeek for the first time]], so they make do with revealing it to some accountant who [[TooDumbToLive tries to]] [[BullyingTheDragon blackmail Batman]].

* The first two BackToTheFuture movies have Marty being unconcious and after waking up says, "You're...You're my mother!". In the third movie, however, he wakes up and says, "You're...who are you?" as it was not his mother this time. The first two movies also had Biff being covered in manure (not the same instance) while the third movie has his ''anecestor'' be covered in manure.

** ...doesn't that happen with most murder mystry/CSI-type shows?

*** He's actually answered no as early on as the 3rd episode. Phineas and Ferb subverting it's running gags since episode 3

*** This doesn't occur each episode, usually because the boys already made it disappear on their own by giving it away (such as a monster truck arena) or it disappeared on it's own (such as a gigant soap bubble bursting.) Regardless, it is gone before Candace can show it to her mother.

*** "[[CaptainObvious It is I]] - Le Clerk!"

* MadeInCanada (syndicated globally as TheIndustry) would have one of the main characters making an aside statement of "[[BlatantLies I think that went well]]" to end every show. [[RunningGag Every. Last. Show.]] For six seasons.

* MadeInCanada (syndicated globally as TheIndustry) would have one of the main characters making an aside statement of "Well, that wasn't so bad" to end every show. [[RunningGag Every. Last. Show.]] For six seasons.

* All ''{{Terminator}}'' films have someone shouting "Get out" as they take over a vehicle. Two other phrases almost qualify: "I'll be back!" (all but T3, which instead features "She'll be back" and "I'm back!"), and "Come with me if you want to live" (T3 features "Do you wanna live?! Come on!!").

** Though possibly not intentional all six films feature a sequence that is beast heavy (the Deep Core in TPM, the Geonosian Arena beasts in AOTC, Boga in Sith, the Banthas and Dewbacks in ANH, the Wampa in Empire, and the Rancor in Jedi). The original three all also introduce a new kind of short people (Jawas, Ugnauts, Ewoks). If you really want to get specific the only movie without a new short person is Attack Of The Clones, TPM has Pit-Droids and Sith has the Boga handlers.

* No love for ''Earthworm Jim''? At the end of each episode, a cow falls on something (a great many variations on this one).