While patrolling over Jupiter, Jace is shot down by a lava monster./A tribe of worm-like creatures captures Dino Boy and Ugh must plan a rescue./Zorak invades Ghost Planet, kidnaps Jan and Jace, and ...

There is a tradition of crossovers between the many characters created by Hanna-Barbera. Beyond such cartoons as Laff-A-Lympics or the more recent Jellystone, even action heroes like Space Ghost and ...