The spiral-haired scientific whiz kid and Nickelodeon TV star blasts off in his first feature-length animated adventure. When he inadvertently contacts alien invaders who abduct all adults from Retroville, it's up to Jimmy, his robot dog Goddard, and his schoolmates to build their own spaceships out of amusement park rides and set out to rescue the grown-ups. Features the voice talents of Debi Derryberry, Patrick Stewart, Martin Short, Frank Welker. 82 min. Widescreen; Soundtrack: English.