Teenage Mutant Ninja Turtles: The Complete Classic Series Collection
Final appearance of Baxter Stockman and 'Z'
Krang says he recognizes the location his portal opens as the dimension they sent Baxter to, but in his last appearance ("Landlord of the Flies"), it was Donatello's portal that banished Baxter, not Krang's.
When Raphael says, "Anyone got a moth-ball?" his words come from Leonardo's mouth.
The stallholder that turns into a giant scorpion is seen again mutating next to the Ring Toss stall.
Leonardo loses a sword while fighting Baxter's mutants at the fairground, but has it back a couple of shots later.
Right after the Spaceship Computer tells Donatello that he controls everything in the Technodrome and the Foot Soldiers attack them, Donatello is no longer holding the Spaceship Computer for one shot.
When Baxter's Amphibious Module draws up in front of the Genetic Research Lab, the vehicle has only two treads, which are positioned in the middle of its underside.
Shredder's boots are light grey when Bebop and Rocksteady set up the explosive in the Technodrome's store room.
Donatello throws his bo at the Spaceship Computer and shuts it down, but his staff doesn't hit actually any of the computer's controls, so it shouldn't shut down.
When Shredder attacks the Turtles with the Retromutagen Ray gun, both of Leonardo's swords are intact despite having one of them destroyed while fighting the Spaceship Computer.
When Baxter saves the Turtles from Shredder's Retromutagen Ray gun, the firing end of the gun turns from red to white.
When the Turtles follow Baxter through the portal, their weapons have vanished from their shells.
When Leonardo draws his sword to destroy the Retromutagen Ray gun, Donatello is seen with Raphael's colors.
The inside of the closet door that the Turtles throw Shredder into is originally colored green, but turns to grey when Shredder pounds on it.