Filmography78 titles
Importing filmography…
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2025 | Liza: A Truly Terrific Absolutely True StoryMovie | Self | 93 |
| 2022 | The Old ManSeries | Morgan Bote | 90 |
| 2021 | tick, tick... BOOM!Movie | "Sunday" Legend #4 | 89 |
| 2020 | Stars in the HouseSeries | Self | 88 |
| 2019 | On BroadwayMovie | Self (archive footage) | 87 |
| 2019 | It Takes a LunaticMovie | Self | 87 |
| 2014 | Late Night with Seth MeyersSeries | Self - Guest | 82 |
| 2014 | Private Screenings: Robert OsborneMovie | Self | 82 |
| 2014 | Trailblazer HonorsSeries | Self - Presenter | 82 |
| 2009 | Nurse JackieSeries | Dick Bobbitt | 77 |
| 2009 | Warehouse 13Series | Monty the Magnificent | 77 |
| 2008 | Hollywood Singing and Dancing: A Musical HistoryMovie | Self | 76 |
| 2007 | Phineas and FerbSeries | Beppo (voice) | 75 |
| 2007 | Private PracticeSeries | Dr. Alexander Ball | 75 |
| 2006 | Brothers and SistersSeries | Dr. Jude Bar-Shalo | 74 |
| 2005 | Grey's AnatomySeries | Dr. Singer | 73 |
| 2004 | HouseSeries | Ezra Powell | 72 |
| 2004 | Broadway: The American MusicalSeries | Self | 72 |
| 2003 | Broadway's Lost TreasuresMovie | Host (segment "Leading Men") / Emcee (segment "Cabaret") | 71 |
| 2001 | Law & Order: Criminal IntentSeries | Milton Winters | 69 |
| 2001 | AliasSeries | Another Mr. Sloane | 69 |
| 2001 | Crossing JordanSeries | Carl Meisner | 69 |
| 2000 | CSI: Crime Scene InvestigationSeries | Hank Kasserman | 68 |
| 2000 | The FantasticksMovie | Amos Bellamy | 68 |
| 2000 | Dancer in the DarkMovie | Oldrich Novy | 68 |
| 1997 | Buffy the Vampire SlayerSeries | Doc | 65 |
| 1996 | My Friend JoeMovie | Simon | 64 |
| 1995 | The Outer LimitsSeries | Gideon Banks | 63 |
| 1995 | Star Trek: VoyagerSeries | Caylem | 63 |
| 1995 | The DangerousMovie | Flea | 63 |
| 1994 | Touched by an AngelSeries | Ronald | 62 |
| 1993 | Blue HeelersSeries | — | 61 |
| 1992 | The PlayerMovie | Joel Grey | 60 |
| 1991 | Marilyn and MeMovie | Johnny Hyde | 59 |
| 1991 | KafkaMovie | Burgel | 59 |
| 1990 | Night of 100 Stars IIIMovie | Self | 58 |
| 1987 | QueenieSeries | Aaron Diamond | 55 |
| 1986 | MatlockSeries | Tommy DeLuca | 54 |
| 1986 | Christmas at Radio City Music HallMovie | Self - Host | 54 |
| 1985 | Remo Williams: The Adventure BeginsMovie | Chiun | 53 |
| 1982 | Night of 100 StarsMovie | Self | 50 |
| 1979 | CBS News Sunday MorningSeries | Self | 47 |
| 1978 | DallasSeries | Adam | 46 |
| 1976 | AliceSeries | — | 44 |
| 1976 | The Muppet ShowSeries | Self - Special Guest Star | 44 |
| 1976 | The Seven-Per-Cent SolutionMovie | Lowenstein | 44 |
| 1976 | Buffalo Bill and the Indians, or Sitting Bull's History LessonMovie | The Producer (Nate Salisbury) | 44 |
| 1976 | Live from Lincoln CenterSeries | Joel Grey | 44 |
| 1974 | Dinah!Series | Self | 42 |
| 1974 | 'Twas the Night Before ChristmasMovie | Joshua Trundle (voice) | 42 |
| 1974 | Flick FlackSeries | — | 42 |
| 1974 | Man on a SwingMovie | Franklin Wills | 42 |
| 1972 | CabaretMovie | Master of Ceremonies | 40 |
| 1972 | The Julie Andrews HourSeries | Self | 40 |
| 1971 | The Sonny & Cher Comedy HourSeries | — | 39 |
| 1970 | Night GallerySeries | Andrew MacBane | 38 |
| 1970 | George M!Movie | George M. Cohan | 38 |
| 1968 | The Dick Cavett ShowSeries | Self - Guest | 36 |
| 1967 | The Carol Burnett ShowSeries | Self - Guest / Various Characters | 35 |
| 1967 | IronsideSeries | Mike Yeager | 35 |
| 1964 | What a Way to Go!Movie | Patron (uncredited) | 32 |
| 1963 | Vacation PlayhouseSeries | Freddy Rockefeller | 31 |
| 1961 | The Mike Douglas ShowSeries | Self - Co-Host | 29 |
| 1961 | Come SeptemberMovie | Beagle | 29 |
| 1960 | Surfside 6Series | Willy | 28 |
| 1958 | BroncoSeries | — | 26 |
| 1958 | 77 Sunset StripSeries | Joey Kellogg | 26 |
| 1958 | LawmanSeries | Owny O'Reilly | 26 |
| 1957 | MaverickSeries | Billy The Kid | 25 |
| 1957 | Tonight Starring Jack PaarSeries | Self | 25 |
| 1956 | The Steve Allen ShowSeries | Self - rehearsing for 'Jack and the Beanstalk' | 24 |
| 1956 | The Dinah Shore Chevy ShowSeries | Self | 24 |
| 1956 | Telephone TimeSeries | — | 24 |
| 1954 | December BrideSeries | Jimmy | 22 |
| 1953 | The OscarsSeries | Self | 21 |
| 1950 | What's My Line?Series | Self - Panelist | 18 |
| 1950 | The Colgate Comedy HourSeries | Self | 18 |
| 1948 | The Ed Sullivan ShowSeries | Self | 16 |