[2] Following Splinter's death and the Super Shredder's destruction at the hands of Leonardo, the Turtles, April O'Neil, Casey Jones and Karai have all moved on with their daily lives.
However, Tiger Claw and an underground cult dedicated to the Foot Clan have plans to bring back the Shredder, with the help of a Demodragon named Kavaxas.
Meanwhile, the gray wolf wizard Jei transports the turtles into his reality to serve as mind-controlled hitmen, to prevent Usagi from ever reaching the Temple of the Sky Buddha.
In the alternate post-apocalyptic future, humanity and most of the mutant-kind have been wiped out after an extremely powerful and destructive mutagen bomb was triggered.
During Halloween, the Turtles and their time-traveling ally, Renet, are reunited with their enemy, Savanti Romero as he plans to turn all of New York City into a monster-filled dystopia while sending them back in time at Transylvania, during the age of Dracula and 1810s Central Europe, with Frankenstein.
Nickelodeon ultimately aired the episodes (and their film compilation) on Nicktoons in the middle of the season, marketing "Wanted: Bebop and Rocksteady" as the series finale instead.
Aided by Mira, Mikey, Donnie and Chompy, they flee in search of "the Green Paradise", but they are forced to confront Maximus Kong, the evil leader of the Wasteland.