- Leonardo (Cam Clarke)
- Donatello (Barry Gordon)
- Michelangelo (Townsend Coleman)
- Raphael (Rob Paulsen)
- Splinter (Peter Renaday)
- April O'Neil (Renae Jacobs)
- Irma Langinstein (Jennifer Darling)
- Burne Thompson (Pat Fraley)
- Vernon Fenwick (Peter Renaday)
- Shredder (James Avery)
- Bebop (Barry Gordon)
- Rocksteady (Cam Clarke)
- Krang (Pat Fraley)
- Professor Chumley (Rene Auberjonois)
- Guy In Grim Reaper Costume - Barry Gordon
Home media releases
- Teenage Mutant Ninja Turtles Season 6
- Teenage Mutant Ninja Turtles: The Complete Classic Series Collection
- When Irma gets locked in the safe and she hunches over saying, "...but nothing gets in the way of Super Irma!" her body's chest area is not only drawn at the wrong angle, but her eyes are slightly off.
- Bebop's mohawk turns brown when Krang is scolding Shredder.
- Not so much an error, but Bebop's skull neckwear's outline gets noticeably thicker when Shredder vows to retrieve the super magnet. As soon as he turns, it's back to normal.
- After Shredder and Krang flee through the garbage shoot, Raphael and Leonardo's masks are switched.
- Shredder's Transport Module's main hatch door opens downwards when he and the mutants are in the professor's lab and is missing its front top tread when they load the Reverse Polarity Magnet into it.
- How does Irma know what the interior of the Technodrome look like?
- When the professor shuts off the magnet, it falls straight down from the magnet with a loud clang. Somehow, it ends up falling on the professor's foot, despite the camera angles suggesting that he's nowhere near where the anvil is going to drop. To compound the issue further, an extremely heavy anvil falls on a man's foot in plain view of three people watching his every move, and nobody notices until he points it out?
- The episode implies that Irma has control over magnetism, so why would a magnetic beam aimed at a body part of Shredder's that wasn't covered in metal at all bowl him over?
- Shredder orders Bebop and Rocksteady to get Irma once the latter knocks him over, but in the next shot, they're all running away from her.
- What reason did the Turtles have for just leaving April and Irma all of a sudden? Shouldn't they have waited until they were escorted home safely first?
- Remember, kids! When using dynamite to blow open a safe, don't run and hide from the blast! Stand right in front of it! Oddly enough, after the Turtles do get hit by the blast, they manage to get away merely dazed.
- Also, the safe door in the aftermath of the blast is clearly not in a logical place. From the way it's positioned, the impact would have had to happen from the inside of the safe.
- Irma overhears of a break-in at Magno Dyne labs from a police broadcast, and yet no police are seen when it cuts to the scene of the crime.
- When the Transport Module burrows under the lab, lava immediately flows from the hole made. Aside from the fact that this is just impossible, recall for a second that the Technodrome is currently underwater, not at the center of the Earth!
- For that matter, any time the transport modules leave and enter the Technodrome during its entire underwater duration, how exactly are the modules leaving and entering it without flooding the thing? And even worse, how do they dig through the false island and magically end up back in the Technodrome...?
- When Irma falls into the transport module before they enter it, how do Shredder, Bebop, and Rocksteady manage to not see her inside?
- Leonardo does a title drop when Splinter suggests that the Turtles go as themselves at the costume party. Subtle.
- This is the first appearance of the Turtle Van's "Submarine Mode". Donatello comments, however, that it can't handle a lot of underwater pressure, which would have some basis in fact due to it primarily being a land vehicle.
- This is the second time Shredder uses a sword for combat only to have it break like a cheap butter knife later on. The first instance would be in the episode Shredder & Splintered.
- This is the third and final time Irma visits the Technodrome. The other two times were in the episodes: The Dimension X Story and The Foot Soldiers are Revolting.
- When the Turtles are discussing what to wear at the Halloween party, Leonardo holds up an Elvis Presley outfit.
- Donatello references the sinking of the Titanic when the Turtles escape from the Technodrome.
- Irma wears a leotard, cape and boots that strongly appear to be based on Wonder Woman.
- First appearance of the Technodrome's main eyeball control room.
Shredder: This time, the anti-magnet is ours!
Bebop: And this time, there's no Super Irma to stop us!
Irma: Hm. That's what they think. *trips over cape* WOOOOOOAAAAH!!!! *falls into Transport Module*
Shredder: What was that?
Rocksteady: Very heavy mice?
Bebop: Very noisy termites?
Shredder: It serves me right for asking you two lunkheads!
- -The dreaded master of the Foot Clan does not know what a screaming woman sounds like.
Shredder: How the devil did she get all the way down here?!
Krang: Truly, she is a woman of skill.
- -Krang - truly a master of deadpan snark.