- Merrily We Roll Along
2025 Writer
- Merrily We Roll Along
2013 Writer
- Company
2011 Writer
- Company: A Musical Comedy
2008 Writer
- Merrily We Roll Along
2002 Original Film Writer
- The Broad Side
2001
- Goodbye Lover
1999 Mr. Merritt
- Bulworth
1998 Older Man
- You Wish
1997 Minister
- Company
1996 Writer
- Dr. Quinn, Medicine Woman
1993 Jedediah Bancroft
- The Nanny
1993 Minister
- Sisters
1991
- Performance
1991 Lyricist
- Wings
1990 Frank
- Joan Rivers and Friends Salute Heidi Abromowitz
1988 George Furth
- CBS Summer Playhouse
1987 Rip
- L.A. Law
1986 Archie Briggs
- Murder, She Wrote
1984 Farley Pressman
- The Man with Two Brains
1983 Timon
- Doctor Detroit
1983 Arthur Skridlow
- MegaForce
1982 Professor Eggstrum
- Young Doctors in Love
1982 The Patients - Disgusting Looking Patient
- The Cannonball Run
1981 A.F. Foyt
- The Scarlett O'Hara War
1980 George Cukor
- Hooper
1978 Bidwell
- Oh, God!
1977 Briggs
- Airport '77
1977 Gerald Lucas
- Charlie Cobb: Nice Night for a Hanging
1977 Conroy
- American Raspberry
1977 President
- Norman... Is That You?
1976 Mr. Sukara
- The Dumplings
1976 Frederic Steele
- Shampoo
1975 Mr. Pettis
- For the Use of the Hall
1975 Martin
- Let's Switch!
1975 Sidney King
- Ellery Queen
1975
- Twigs
1975 Writer
- Blazing Saddles
1974 Van Johnson
- Little House on the Prairie
1974 Hannibal Godfrey
- Happy Days
1974 Mr. Pinney
- The Third Girl from the Left
1973 Zimmy
- What Are Best Friends For?
1973 Barry Chambers
- Sleeper
1973 Guest at Luna's Party (uncredited)
- Who Killed the Mysterious Mr. Foster?
1971 Fletcher
- All in the Family
1971 Whitney Fitzroy IV
- Tales of Washington Irving
1970 Ichabod Crane (voice)
- Myra Breckinridge
1970 Charlie Flager Jr.
- The Odd Couple
1970 Harvey
- Night Gallery
1970 Gillings (segment "The Little Black Bag")
- Butch Cassidy and the Sundance Kid
1969 Woodcock
- Love, American Style
1969 Phil
- The Boston Strangler
1968 Lyonel Brumley
- What's So Bad About Feeling Good?
1968 Murgatroyd
- Nobody's Perfect
1968 Hamner
- P.J.
1968 Sonny Silene
- The Good Guys
1968
- Adam-12
1968 Tyler Finch
- Tammy and the Millionaire
1967 Dwayne Whitt
- The Cool Ones
1967 Howie
- Games
1967 Terry
- Ironside
1967 Ray Harrison
- Fame Is the Name of the Game
1966 Morgue Attendant
- Batman
1966 Gallus
- That Girl
1966
- The Monkees
1966 Henry
- Felony Squad
1966
- A Rage to Live
1965 Paul Rutherford
- A Very Special Favor
1965 Pete
- Green Acres
1965
- F Troop
1965
- I Dream of Jeannie
1965 Farnum
- Laredo
1965
- Run for Your Life
1965 Osborne Parquette III
- Tammy
1965 Dwayne Whitt
- Honey West
1965 Sandy Corbin
- The New Interns
1964 Dr. Phil Osterman
- The Best Man
1964 Tom
- Profiles in Courage
1964 Stanley
- Broadside
1964 Ens. Beasley
- Arrest and Trial
1963
- Going My Way
1962
- The Alfred Hitchcock Hour
1962 Charlie
- Merrily We Roll Along
Musical
