DESC: Boy scientist Jimmy Neutron returns with more comic inventions in this special double-length episode of the computer-animated Nickelodeon series. "Attack of the Twonkies" finds the whiz kid battling a mutant alien species that he himself brought back from outer space but is now threatening to overrun Retroville! The DVD edition includes 3 bonus episodes: "Send in the Clones," "A Beautiful Mine," and "The Junkman Cometh."