Terror Tales of the Park IV The park workers tell scary stories to keep Muscle Man awake while driving to visit his mother on Halloween. Details Casts Title Terror Tales of the Park IV Genres Animation Comedy Release Date 2014-10-29 Episode Runtime 00 Hours 11 Minutes Season Number 6 Episode Number 4 Production Companies Cartoon Network Studios J.G. Quintel Mordecai / Hi Five Ghost? William Salyers Rigby (voice) Mark Hamill Skips (voice) Sam Marin Benson / Pops / Muscle M?