A collection of cartoons emceed by the decidedly offbeat Space Ghost, the animated superhero who was a Saturday-morning icon in the '60s and won over a new generation of fans in the '90s as a talk-show `host' with human guests on `Space Ghost: Coast to Coast.' The celestial specter was joined on `Planet' by his old-time foils, the evil mantis, Zorak, and space pirate Brak, as the trio peppered their introductions with zany skits and songs.