After a high school lab experiment goes horribly wrong, Mordecai and Rigby must go back in time to battle an evil volleyball coach in order to save the universe — and their friendship.
Cast
J.G. Quintel
Mordecai / Hi-Five Ghost (voice)
William Salyers
Rigby (voice)
Sam Marin
Benson / Pops / Muscle Man (voice)
Mark Hamill
Skips (voice)
Minty Lewis
Eileen (voice)
Jason Mantzoukas
Mr. Ross (voice)
David Koechner
Principal Dean (voice)
Roger Craig Smith
Jablonski / Frank Smith / Fast Food Guy (voice)
Ali Hillis
Ship Computer / Rigby's Mom (voice)
Kurtwood Smith
Gene (voice)
Eddie Pepitone
Sherm (voice)
Paul F. Tompkins
Gino (voice)
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