Peter, Joe, and Quagmire search for the source of a dirty joke.
Quest roles:
Gary Cole(Principal Shepherd (voice)), Kevin Michael Richardson(Tanned Old Man (voice)), Sanaa Lathan(Donna Tubbs (voice)), Wally Wingert(Man (voice)), Marc Alaimo(Dean of the Secret Order of Dirty Joke Writers (voice)), Ioan Gruffudd(Prince Charles (voice)), David Lynch(David Lynch (voice))