When April is waving good-bye to the turtles when they are leaving to rescue Splinter, it's Irma voice that is speaking.
Krang's eyes are colored dark purple instead of pale purple.
April: Irma, Joe Eyeball has a thing for you.
Irma: I know; it worries me.
Muckman: This abounded warehouse here might make a good hideout.
Joe Eyeball: Hey, why not? It works in ever other story.
Splinter: Do what you will with me Shredder, but know that evil can never conquer good.
Shredder: Don't be ridiculous. Of course it can. Why else would I be in this line of work.
Leonardo: Shredder and Krang are getting away!
Raphael: Hey, we're in the Arctic. Where can they go?
(The Portable Portal Generator explodes)
Raphael: Another example of cutting edge technology.
Bebop: How are we gonna know this Compound X-7 stuff if we see it?
Shredder: Simple. It will say "Compound X-7" on the label.
Bebop: That would be real helpful...if we could read.
Episode included on the Teenage Mutant Ninja Turtles Season 5 DVD release.