Filmography41 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2025 | SEGALMovie | Self | 87 |
| 2023 | You PeopleMovie | Dr. Green | 85 |
| 2020 | Natalie Wood: What Remains BehindMovie | Self | 82 |
| 2014 | Magician: The Astonishing Life and Work of Orson WellesMovie | Self - Filmmaker | 76 |
| 2008 | Childrens HospitalSeries | Dan Richards | 70 |
| 2007 | Pushing DaisiesSeries | Jerry Holmes | 69 |
| 2004 | The Goodbye GirlMovie | Oliver Frey | 66 |
| 2003 | Marci XMovie | Ben Feld | 65 |
| 2003 | Halloween: A Cut Above the RestMovie | Peter Martin (archive footage) (uncredited) | 65 |
| 2002 | AFI's 100 Years... 100 Passions: America's Greatest Love StoriesMovie | Self | 64 |
| 2001 | The Shrink Is InMovie | Samantha's Editor (uncredited) | 63 |
| 2000 | TitusSeries | Bill | 62 |
| 1998 | The Pentagon WarsMovie | Casper Weinberger | 60 |
| 1997 | Deconstructing HarryMovie | Ken | 59 |
| 1992 | Mad About YouSeries | Mr. Frank DiChristophoro | 54 |
| 1992 | Love & WarSeries | — | 54 |
| 1982 | Natalie - A Tribute to a Very Special LadyMovie | — | 44 |
| 1980 | How to Beat the High Cost of LivingMovie | Albert | 42 |
| 1980 | The Last Married Couple in AmericaMovie | Marv Cooper | 42 |
| 1980 | First FamilyMovie | Press Secretary Bunthorne | 42 |
| 1979 | Scavenger HuntMovie | Stuart Selsome | 41 |
| 1979 | Love at First BiteMovie | Dr. Jeffery Rosenberg / Van Helsing | 41 |
| 1977 | QuarkSeries | Adam Quark | 39 |
| 1975 | Saturday Night LiveSeries | Self - Host | 37 |
| 1975 | The Sunshine BoysMovie | Ben Clark | 37 |
| 1975 | The Lion Roars AgainMovie | Self | 37 |
| 1973 | The Last of SheilaMovie | Tom Parkman | 35 |
| 1973 | WestworldMovie | Peter Martin | 35 |
| 1973 | On Location with WestworldMovie | Self (uncredited) | 35 |
| 1972 | Portnoy's ComplaintMovie | Alexander Portnoy | 34 |
| 1971 | The Marriage of a Young StockbrokerMovie | William Alren | 33 |
| 1971 | The SteagleMovie | Harold Weiss | 33 |
| 1970 | Catch-22Movie | Maj. Danby | 32 |
| 1970 | Diary of a Mad HousewifeMovie | Jonathan Balser | 32 |
| 1969 | Goodbye, ColumbusMovie | Neil Klugman | 31 |
| 1967 | He & SheSeries | Dick Hollister | 29 |
| 1963 | Vacation PlayhouseSeries | Ted Penny | 25 |
| 1962 | The Tonight Show Starring Johnny CarsonSeries | Self | 24 |
| 1961 | Dr. KildareSeries | Dr. Adam Barstow | 23 |
| 1951 | Hallmark Hall of FameSeries | Meyer Shine | 13 |
| 0 | Science Fiction Film AwardsSeries | Himself | — |