S03E19 - Invasion of the Turtle Snatchers
Synopsis
The Turtles throw April a surprise party to celebrate her first anniversary as a reporter at Channel Six News, but April is not feeling very celebratory -- it seems that Burne Thompson has suggested that she will not be celebrating her second anniversary if she does not find a story soon. Donatello and Irma rush out to get a special pizza in an effort to lift her spirits. Meanwhile, Krang and Shredder send Rocksteady and Bebop up to the Earth's surface to locate "a new source of energy generated by the Nucleon Fission Reactor at the University". But the mutants think that Shredder is sending them "fishing" and when they finally learn their mistake, a bright ray of light, coming from out of the sky, zaps Rocksteady and he disappears.