Donatello and April investigate a scientist’s disappearance, but discover a conspiracy regarding a bizarre psychic monkey instead.

Michelangelo befriends Leatherhead, an unstable mutant alligator who possesses a strange piece of Kraang technology, but the other Turtles aren’t sure whether Leatherhead is a friend or a foe.

The Turtles meet their first fan when a teenager decides to dress up and fight crime as "The Pulverizer.

While the Turtles are infiltrating an undersea Kraang base, the Foot Clan attempts to capture April.