Underdog - Season 3 Episode 13 The Marbleheads, Part 1
A strange object crash-lands on earth. A group of scientists check out the mysterious object, determining that it's a harmless, dead comet. The scientists leave the scene unaware of the fact that a secret door opens from the center of this strange thing and two evil looking space aliens emerge from this strange object.
- Genre: Animation, Comedy
- Studio: NBC
- Keyword: superhero, dog, cartoon dog
- Cast: Wally Cox, Sandy Becker, Kenny Delmar, George S. Irving, Mort Marshall, Norma MacMillan
"
