Filmography44 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2024 | ElsbethSeries | Dr. Yablonski | 79 |
| 2020 | Star Trek: PicardSeries | Professor James Moriarty | 75 |
| 2020 | Stars in the HouseSeries | Self | 75 |
| 2018 | New AmsterdamSeries | Vic Wallace | 73 |
| 2017 | The Good FightSeries | Professor Harrison | 72 |
| 2014 | GothamSeries | Jacob Skolimski | 69 |
| 2013 | The BlacklistSeries | Baldur Magnusson | 68 |
| 2012 | ElementarySeries | Antoine LaGrange | 67 |
| 2010 | The Fran Drescher ShowSeries | — | 65 |
| 2006 | The PrestigeMovie | Judge | 61 |
| 2006 | Ugly BettySeries | Dr. Morgan Remus | 61 |
| 1997 | The PracticeSeries | Judge Barton Wolfe | 52 |
| 1996 | Remember WENNSeries | Desmond Quist | 51 |
| 1995 | The Nanny: Oy to the WorldMovie | Niles (voice) | 50 |
| 1994 | DuckmanSeries | Rodney (voice) | 49 |
| 1994 | Chicago HopeSeries | Gambler #2 | 49 |
| 1993 | FrasierSeries | Dr. Shafer | 48 |
| 1993 | The NannySeries | Niles | 48 |
| 1991 | PalominoMovie | Doctor | 46 |
| 1991 | RugratsSeries | Conan McNulty / Wrestler (voice) | 46 |
| 1990 | The Hunt for Red OctoberMovie | CPT Charlie Davenport (USS Enterprise) | 45 |
| 1990 | HavanaMovie | Marion Chigwell | 45 |
| 1989 | K-9Movie | Halstead | 44 |
| 1987 | Star Trek: The Next GenerationSeries | Professor James Moriarty | 42 |
| 1987 | Frank's PlaceSeries | Arnold David Tuney | 42 |
| 1986 | MatlockSeries | James Billings | 41 |
| 1986 | L.A. LawSeries | C. Howard Grady | 41 |
| 1986 | Davy CrockettMovie | Congressman | 41 |
| 1985 | MacGyverSeries | Nicholas Helman | 40 |
| 1985 | The EqualizerSeries | Eddie Mason | 40 |
| 1985 | Tall Tales & LegendsSeries | Congressman | 40 |
| 1985 | Chain LettersMovie | Steve | 40 |
| 1985 | The Eagle and The BearMovie | Underhill | 40 |
| 1984 | Murder, She WroteSeries | Neal Dishman | 39 |
| 1984 | Highway to HeavenSeries | — | 39 |
| 1983 | The A-TeamSeries | Phillips | 38 |
| 1983 | Scarecrow and Mrs. KingSeries | — | 38 |
| 1982 | Remington SteeleSeries | Pierre Fumar | 37 |
| 1982 | Cagney & LaceySeries | — | 37 |
| 1982 | CheersSeries | Mr. Reinhardt | 37 |
| 1981 | DynastySeries | — | 36 |
| 1974 | In FashionMovie | Moulineaux | 29 |
| 1971 | Great PerformancesSeries | Moulineaux | 26 |
| 1971 | ColumboSeries | Alex Varrick | 26 |