Mung has told Lord Dregg that he went to Dimension X and discovered that Shredder and Krang, who are still stuck there, also had many, many encounterings with the Turtles. Dregg transports Shredder and Krang to the Dreggnought where makes a deal to them to destroy the Turtles together.
- Leonardo (Cam Clarke)
- Donatello (Barry Gordon)
- Raphael (Michael Gough)
- Michelangelo (Townsend Coleman)
- April O'Neil (Renae Jacobs)
- Carter (Bumper Robinson)
- Lord Dregg (Tony Jay)
- Shredder (Bill Martin)
- Krang (Pat Fraley)
- Mung (Cam Clarke)
- Cab Driver (Pat Fraley)
- April's Sports Car
- Taxi Cab
Home media releases
- Teenage Mutant Ninja Turtles: The Complete Final Season
- Teenage Mutant Ninja Turtles: The Complete Classic Series Collection
- At the Newspan building, the elevator button that April presses flashes red, but the red light doesn't come out of the button; it comes on next to it.
- The interior of April's car is gray, but in one shot of Shredder and Krang when Raphael and Leonardo jump onto roof, the interior is yellow.
- In April's car, Shredder is sitting behind April and Krang is sitting behind the passenger seat. After Dregg beams them to his lair, Krang is sitting behind April and Shredder is sitting in the passenger seat.
- When the Turtles are tied up by Dregg to have their life sources drained, they are lined up in the following order from left to right - Raphael, Donatello, Leonardo and Michelangelo. But when Michelangelo speaks, he is suddenly next to Raphael.
- First appearance of Shredder and Krang since "Turtle Trek".
- The sound effect for the vortex transporter in this episode included the sound effect of the transporters in Star Trek: The Motion Picture