I'm My Own Grandpa

An actor plays a relative of their usual character.

The Odd Couple

Appearances

• The Munsters: Season 1, episode 9, "Knock Wood, Here Comes Charlie" (1964). Fred Gwynne plays both Herman Munster and his brother, Charlie.
• The Patty Duke Show: Season 2, episode 18, "The Perfect Hostess" (1965). Patty Duke plays Patty and Cathy's cousin Betsy, who comes to visit from the south.
• The Dick Van Dyke Show: Season 5, episode 7, "The Great Petrie Fortune" (1965). Dick Van Dyke plays both Rob Petrie and his deceased uncle, Hezekiah.
• The Addams Family: Season 2, episodes 2-3, "Morticia's Romance" (1965). Carolyn Jones plays both Morticia Addams and her sister, Ophelia Frump.
• The Odd Couple: Season 1, episodes 22, "What Makes Felix Run" (1971). Felix has a flashback to his childhood in which Tony Randall plays Felix's grandfather.
• The Odd Couple: Season 2, episode 18, "Where's Grandpa?" (1972). Tony Randall plays Felix's grandfather, who comes to stay with Oscar while Felix is on vacation.
• The Odd Couple: Season 4, episode 15, "Cleanliness is Next to Impossible" (1974). Jack Klugman plays Oscar's father in a flashback with his son, Adam Klugman, playing young Oscar.
• The Odd Couple: Season 5, episode 10, "Our Fathers" (1974). Jack Klugman and Tony Randall play Oscar's and Felix's fathers in a flashback story about how they happened to meet in Chicago during prohibition.
• Are You Being Served?: Season 5, episode 3, "Founder's Day" (1977). John Inman plays both Mr. Humphries and his mother.
• Soap: Season 1, episode 20 (1978). Howard Hesseman, who previously played a defense attorney who refused to take Jessica's case, returns as his twin brother, who's prosecuting Jessica's case.
• WKRP in Cincinnati: Season 3, episode 7, "Bah, Humbug" (1980). Gordon Jump plays Mr. Carlson and the ghost of his grandfather.
• WKRP in Cincinnati: Season 4, episode 20, "The Impossible Dream" (1982). Richard Sanders plays Les Nessman and his mother.
• Cheers: Season 2, episode 2, "Little Sister, Don't Cha" (1983). Rhea Perlman plays both Carla and her sister, Annette.
• It's a Living: Season 6, episode 13, "He Never Sang for His Father" (1989). Paul Kreppel plays both Sonny Mann and his father, Irving.
• Seinfeld: Season 7, episode 16, "The Doll" (1996). Jerry Stiller plays Frank Costanza and his Italian cousin from Tuscany, Giuseppe.
• Arrested Development: Season 1, episode 20, "Whistler's Mother" (2004). Jeffrey Tambor plays both George Bluth and his twin brother, Oscar.