Party Horse
An alien pod crashes onto Earth and an alien horse known as Party Horse turns to Mordecai and Rigby to help him pass a U.S. History test.

Cast
J.G. QuintelMordecai / Hi Five Ghost (voice)
William SalyersRigby (voice)
Mark HamillSkips (voice)
Sam MarinBenson / Pops / Muscle Man (voice)
Minty LewisEileen (voice)
Matthew MercerChance Sureshot / Recap Robot (voice)
Vanessa MarshallToothpick Sally (voice)Regular Show on tvt

