Casey Jones becomes an unwanted houseguest in the Turtles' lair, so Raphael takes him topside to get some much needed air. During a routine skirmish with the Purple Dragons, Raph and Casey encounter the Foot Tech Ninja, whose cyber armor enhances their strength and speed, while offering invisibility. Raphael is kidnapped and interrogated by Hun, while Casey escapes to get help.
First appearance of the Foot Tech Ninja and the Guardians
This episode provides examples of:
- Ambiguously Human: The Foot Tech ninjas. Stockman talks about creating them but that could just mean the suits and some are seen with bandages or appear to show human emotions across this episode and others. Casey also initially remarks that they aren't human.
- Ambiguous Syntax: Shredder is having Raph interrogated to find out if he works for "His enemies" leaving their true identity a mystery for now.
- Batman Gambit: Hun allowed Raph to escape so that the Foot Tech Ninja could follow him all the way back to the lair. The other Turtles anticipate this and meet them all part way.
- Batter Up!: One of the Purple Dragon thugs Raph and Casey confront wields two baseball bats. Casey calls him out.Casey: Dude, you're totally stealing my act!
- Beat Them at Their Own Game: In the climax, Mike uses Splinter's teaching, hides in the shadows, employing the way of invisibility and defeats the Foot Tech Ninja, who have cloaking devices that can actually render them completely invisible.
- Cassandra Truth: When Casey tells the Turtles about Raph's kidnapping by the Foot Tech Ninjas, Mikey doesn't believe him at first.Mikey: Invisible ninjas, huh? This story wouldn't involve Santa Claus and the Easter Bunny by any chance?
- Chekhov's Skill/Chekhov's Classroom: In the beginning, Splinter tries to teach the Turtles the way of balance and the way of invisibility. Michelangelo remembers Master Splinter's words and shows the invisible Foot Tech Ninja that they aren't the only ones who can play the vanishing game by sneaking up behind one of them and defeating him, while saving Casey's life.
- Deadpan Snarker: Mike spends most of the episode taking shots at Casey for crashing in their lair.Splinter: Raphael may not even be aware he is being followed.
Leo: Which means we gotta find him before he brings in some seriously unwanted house guests.
Mike: (Looks at Casey) We already got one of those.- Also Raph. See the Your Mom exchange below.
- Die, Chair, Die!: Casey takes out his anger at Raph's kidnapping on the Turtles' furniture. They eventually start to worry about running out.
- Eye Scream: Stockman's failure four episodes has resulted in his left eye being clawed out.
- Golf Clubbing: Casey uses his golf club to splatter the Foot Tech Ninjas with mud so Raph can see them.
- Interrogated for Nothing: Hun tries to figure out if Raph is working for the Shredder's enemies, and asks him questions like "How long have you been on this planet?" Raph has no idea what he's talking about, and Hun concludes to Saki that he was telling the truth.
- Invisibility Cloak: The Foot Tech Ninja.Casey: Cloaking device? What are they, Klingons?
- It's All My Fault: Casey blames himself for Raph getting captured
- Jack Bauer Interrogation Technique: Hun threatens Raph with a buzzsaw in order to get him to talk.
- Mistaken for Aliens: Hun interrogates Raph, thinking he is some sort of alien.Hun: We've been over this again and again, freak. I'm only gonna ask you this one more time. Who do you work for? How long have you been on this planet? What is the level of your technology?
Raph: Planet? Technology? Boy, are you barking up the wrong shell! - Pet the Dog: Saki doesn't hold this failure against Hun, saying his plan was sound and only failed because of Stockman's technology.
- Percussive Maintenance: Casey stomps the DVD player trying to make it eject. It crumples under his boot.
- See the Invisible: Having just encountered the Foot-Tech Ninja, Casey uses spray-paint to make them visible. Don later provides the team thermal-vision goggles.
- Small Role, Big Impact: The Purple Dragons of the episode are barely there for two minutes but one of them managing to call the Foot The Ninjas as Raph and Casey attack kicks off the rest of the episode (and indirectly the events of the Shredder Strikes Back an some of what follows given how Hun's interrogation determines the Turtles aren't allied with Shredder's enemies).
- Strapped to an Operating Table: Raph, by Hun.
- Trick-and-Follow Ploy: Hun allows Raph to escape so the Foot-Tech Ninja can follow him home. Fortunately, the others work out what's going on and meet them halfway.
- The Thing That Would Not Leave: Casey. Michelangelo even calls him such when he leaves with Raph.Mikey: And that's how they defeated "The Thing That Wouldn't Leave".
- Turned Against Their Masters: The Foot Tech Ninjas dragged Stockman off to get "Punished" on Shredder's orders
- Volleying Insults: Raph and Casey for this episode.
- Wrong Genre Savvy: Hun initially thinks Raph is an alien.Raphael: Planet? Technology? Boy're you barkin' up the wrong shell.
- You Have Failed Me: Stockman once again. This time, Saki sends the new ninjas and Hun to deal with him.
- Your Mom:Hun: (inspecting Raphael's sai) This is some nice steel. How about telling me who gave them to you?
Raph: Yo' momma.
