Plot: After all the reporters and news crew leave the site of the strange object, two stonehead creatures from the planet Granite, named Gravel and Crusher, emerge from the craft with their Granite Gun. Their mission is to collect 10 slaves to bring back to their planet to work in the rock mines
Underdog - Season 3 - The Marbleheads, Part 2 (Episode 14)
Episode Aired On:
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No estimated release date
Wally Cox
Sandy Becker
Kenny Delmar
George S. Irving
Allen Swift