The Impossible Years is a 1965 comedy play written by Robert Fisher and Arthur Marx, son of comedian Groucho Marx. After two previews, the Broadway production, directed by Arthur Storch, opened on October 13, 1965, at the Playhouse Theatre, where it ran for 670 performances. The original cast included Alan King, Sudie Bond, Bert Convy, Neva Small, and Scott Glenn. Ed McMahon temporarily assumed the role of Dr. Jack Kingsley for eight performances from January 17, 1966, to January 22, 1966, so Alan King could honor a previously scheduled Miami night club engagement.