- The Old Man
2022 Morgan Bote
- tick, tick... BOOM!
2021 "Sunday" Legend #4
- Broadway Musicals: A Jewish Legacy
2013 Narrator
- Warehouse 13
2009 Monty the Magnificent
- Nurse Jackie
2009 Dick Bobbitt
- Choke
2008 Phil
- Drama, Tanz und Beine
2007 Narrator
- Private Practice
2007 Dr. Alexander Ball
- Phineas and Ferb
2007 Beppo (voice)
- Brothers and Sisters
2006 Dr. Jude Bar-Shalo
- Grey's Anatomy
2005 Dr. Singer
- House
2004 Ezra Powell
- Broadway's Lost Treasures
2003 Host (segment "Leading Men") / Emcee (segment "Cabaret")
- 111 Gramercy Park
2003 Hornsby
- Short Cuts
2002 Tom McQuilten
- On the Edge
2001 Dr. Mensley (segment "Reaching Normal")
- Alias
2001 Another Mr. Sloane
- Further Tales of the City
2001 Guido
- Law & Order: Criminal Intent
2001 Milton Winters
- Crossing Jordan
2001 Carl Meisner
- Dancer in the Dark
2000 Oldrich Novy
- The Fantasticks
2000 Amos Bellamy
- CSI: Crime Scene Investigation
2000 Hank Kasserman
- A Christmas Carol
1999 Ghost of Christmas Past
- Buffy the Vampire Slayer
1997 Doc
- The Empty Mirror
1996
- My Friend Joe
1996 Simon
- The Dangerous
1995 Flea
- The Wizard of Oz in Concert: Dreams Come True
1995 Professor Marvel / The Gatekeeper / The Carriage Driver / The Palace Guard / The Wizard of Oz
- Venus Rising
1995 Jimmie
- Star Trek: Voyager
1995 Caylem
- The Outer Limits
1995 Dr. Nathan Seward
- Touched by an Angel
1994 Ronald
- The Music of Chance
1993 Willy Stone
- Blue Heelers
1993
- The Player
1992 Joel Grey
- Kafka
1991 Burgel
- Marilyn and Me
1991 Johnny Hyde
- Brooklyn Bridge
1991
- Cabaret
1988 The Emcee
- Queenie
1987 Aaron Diamond
- Matlock
1986 Tommy DeLuca
- Remo Williams: The Adventure Begins
1985 Chiun
- The Compleat Gilbert & Sullivan
1984 Jack Point
- The Yeomen of the Guard
1982 Jack Point
- Dallas
1978 Adam
- Buffalo Bill and the Indians, or Sitting Bull's History Lesson
1976 The Producer (Nate Salisbury)
- The Seven-Per-Cent Solution
1976 Lowenstein
- Alice
1976
- Live from Lincoln Center
1976 Joel Grey
- 'Twas the Night Before Christmas
1974 Joshua Trundle (voice)
- Man on a Swing
1974 Franklin Wills
- Flick Flack
1974
- Cabaret
1972 Master of Ceremonies
- Man on a String
1972 Big Joe Brown
- George M!
1970 George M. Cohan
- Night Gallery
1970 Andrew MacBane
- Ironside
1967 Mike Yeager
- What a Way to Go!
1964 Patron (uncredited)
- Vacation Playhouse
1963 Freddy Rockefeller
- Come September
1961 Beagle
- Surfside 6
1960 Willy
- Bronco
1958
- Lawman
1958 Owny O'Reilly
- 77 Sunset Strip
1958 Joey Kellogg
- Maverick
1957 Billy The Kid
- Telephone Time
1956
- December Bride
1954
- About Face
1952 Bender
