Supernatural 8x08 Official Description
Hunteri Heroici - Nov. 28
CARTOONS AREN’T ALWAYS FUNNY — Castiel (Misha Collins) tells Sam (Jared Padalecki) and Dean (Jensen Ackles) that he’s decided to become a hunter like them. Sam and Dean aren’t sold on the idea but agree to investigate a case Cas found where a man’s heart literally burst through his chest. The guys discover there has been more than one odd murder in the small town and all of them resemble cartoon deaths. Paul Edwards directed the episode written by Andrew Dabb (#808).
Bonus spoiler: “This episode features a guest appearance by Mike Farrell from M.A.S.H. who plays an old Winchester family friend who the trio also try to save. During a visit to the Supernatural set in September, we watched Mike, Jared Padalecki and Misha Collins film a scene for this episode that involves Castiel and Sam jumping into the head of Mike’s character in order to try help him in a cartoon-type world.”