Terror of the Black Knight Billy tries to show off at the Renaissance festival. Details Casts Title Terror of the Black Knight Genres Animation Comedy Kids Release Date 2003-08-01 Episode Runtime 00 Hours 11 Minutes Season Number 2 Episode Number 21 Production Companies Cartoon Network Studios Greg Eagles Grim (voice) Richard Steven Horvitz Billy (voice) Grey DeLisle Mandy (voice) Vanessa Marshall Irwin (voice)