Mr. Belvedere Season 3 Episode 5 Halloween ( Air Date 1986-10-31 ) Genre Comedy category. Overview "George is to become a member of The Happy Guys of Pittsburgh but on the night of the induction, which happens to be Halloween, George and Marsha discover the Happy Guys have a dark side. Meanwhile, Mr. Belvedere shows a different side after he goes wild toilet papering a house while trick or treating with Wesley.".