Joseph Maher
- The Out-of-Towners
1999 Mr. Wellstone
- All Revved Up
1998 Mr. Lilly
- Hoods
1998 Dr. Alstrich
- Style & Substance
1998 Hadley John
- In & Out
1997 Father Tim
- Mars Attacks!
1996 Decorator
- Surviving Picasso
1996 Kahnweiler
- Goode Behavior
1996 Chancellor Willoughby
- I.Q.
1994 Nathan Liebknecht
- The Shadow
1994 Isaac Newboldt
- Bulletproof Heart
1994 Dr. Alstricht
- Baby Brokers
1994 Leo
- Chicago Hope
1994 David Stadson
- Partners
1993 Edward Hooper
- Sister Act
1992 Bishop O'Hara
- Laurie Hill
1992 Dr. Walter Wiseman
- Batman: The Animated Series
1992 Dr. Dorian (voice)
- The Local Stigmatic
1990 David
- Seinfeld
1989 Gavin Pollone
- Tales from the Crypt
1989 Judge #1 / Judge #2 / Judge #3 (segment "Let the Punishment Fit the Crime")
- Anything but Love
1989 Brian Allquist
- Funny Farm
1988 Michael Sinclair
- My Stepmother Is an Alien
1988 Lucas Budlong
- Bigfoot
1987 Jack Kendrix
- thirtysomething
1987
- Boys Will Be Boys
1987 Saint Peter
- Aladdin and His Wonderful Lamp
1986 Sultan
- ALF
1986 Angel Bob
- Cinderella
1985 Narrator
- Moonlighting
1985 Jerome
- Stingray
1985
- Double Dare
1985 Sylvester
- Frankenweenie
1984 Mr. Chambers
- The Evil That Men Do
1984 Dr. Clement Molloch
- Murder, She Wrote
1984 Nigel Allison
- Will There Really Be a Morning?
1983 1st Doctor
- I'm Dancing as Fast as I Can
1982 Dr. Kalman
- St. Elsewhere
1982 Mr. Milbourne
- Faerie Tale Theatre
1982 Sultan
- Little Gloria... Happy at Last
1982 Smythe
- Under the Rainbow
1981 The Duke
- Going Ape!
1981 Gridley
- Those Lips, Those Eyes
1980 Fibby Geyer
- Just Tell Me What You Want
1980 Dr. Coleson
- Time After Time
1979 Adams
- My Old Man
1979 Phil Kiley
- Heaven Can Wait
1978 Sisk
- Diary of the Dead
1976 Walter Johnson (as Joe Maher)
- Forget-Me-Not Lane
1975 Frank
- My Father's House
1975 Doctor
- Wonder Woman
1975 Edgar Percy
- Ellery Queen
1975
- When Things Were Rotten
1975 The Emissary
- For Pete's Sake
1974 Mr. Coates
- It Ain't Easy
1972 Charlie
- M*A*S*H
1972 Major Taylor
- Great Performances
1971 Frank
- The Applicant
1967 Mr. Graham
- Passages from James Joyce's Finnegans Wake
1967 Celebrant
- Another World
1964
- Little Moon of Alban
1958 British Soldier
