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.
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)
