Regular Show
When Mordecai and Rigby meet a caveman, they decide to put his unique prehistoric physique to good use: chugging cheese! But could this caveman actually turn out to be a Neanderthal nuisance?
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J.G. Quintel
Mordecai / Hi Five Ghost (voice)
William Salyers
Rigby (voice)
Mark Hamill
Skips (voice)
Sam Marin
Benson / Pops / Muscle Man (voice)
Roger Craig Smith
Thomas (voice)
Courtenay Taylor
Diane / Phone / Kid (voice)
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