
Filmography149 titles
Importing filmography…
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2026 | Star Trek: Starfleet AcademySeries | The Doctor | 73 |
| 2022 | Quantum LeapSeries | Dr. Edwin Woolsey | 69 |
| 2022 | The Shuttlepod ShowSeries | Self | 69 |
| 2022 | Confess, FletchMovie | Count Clementi Arbogastes De Grassi | 69 |
| 2021 | Star Trek: ProdigySeries | The Doctor (voice) | 68 |
| 2021 | CSI: VegasSeries | Carlo Rey | 68 |
| 2021 | After MasksMovie | Dr. Robinson (Past Cure Segment) | 68 |
| 2020 | Star Trek DaySeries | Self | 67 |
| 2020 | Stars in the HouseSeries | Self | 67 |
| 2020 | Mythic QuestSeries | Principal Taggart | 67 |
| 2019 | DickinsonSeries | Ithamar Conkey | 66 |
| 2018 | Station 19Series | Mr. Nelligan | 65 |
| 2018 | ButtonsMovie | Mr. Wentworth | 65 |
| 2017 | Young SheldonSeries | Professor Salzman | 64 |
| 2017 | The OrvilleSeries | Ildis Kitan | 64 |
| 2017 | The Good FightSeries | Arbiter Alan Mannheim | 64 |
| 2017 | A Bad FeelingMovie | Self | 64 |
| 2016 | LuciferSeries | Yuri | 63 |
| 2016 | Hail, Caesar!Movie | Rabbi | 63 |
| 2016 | Justice League ActionSeries | Harvey Dent / Two-Face (voice) | 63 |
| 2016 | The MeddlerMovie | Cos | 63 |
| 2015 | Mansion of BloodMovie | Samuel Corbett | 62 |
| 2014 | The FlashSeries | Dexter Myles | 61 |
| 2014 | Age of TomorrowMovie | General Magowan | 61 |
| 2012 | The Client ListSeries | Judge Hughes | 59 |
| 2012 | The Inspector ChroniclesMovie | Bernard | 59 |
| 2012 | PerceptionSeries | A. Z. Weyland | 59 |
| 2011 | Austin & AllySeries | Dr. Grant | 58 |
| 2011 | Body of ProofSeries | Henry Pedroni | 58 |
| 2011 | Happy EndingsSeries | Mr. Logan | 58 |
| 2011 | Harry's LawSeries | Annie's Psychiatrist | 58 |
| 2011 | JessieSeries | Cyril Lipton | 58 |
| 2011 | Femme FatalesSeries | Hieronymus Hawks | 58 |
| 2011 | The CaptainsMovie | Self | 58 |
| 2011 | Beethoven's Christmas AdventureMovie | Smirch | 58 |
| 2010 | Hawaii Five-0Series | C.I.A. Man | 57 |
| 2010 | JustifiedSeries | Karl Hanselman | 57 |
| 2010 | Mega Shark vs. CrocosaurusMovie | Admiral Calvin | 57 |
| 2009 | CastleSeries | Clark Murray | 56 |
| 2009 | Stargate UniverseSeries | Richard Woolsey | 56 |
| 2009 | SensoredMovie | Wade Mixon | 56 |
| 2009 | Chasing the GreenMovie | — | 56 |
| 2008 | The MentalistSeries | Jason Cooper | 55 |
| 2008 | P.J.Movie | Stan Jamison | 55 |
| 2007 | ChuckSeries | Perseus | 54 |
| 2007 | Women's Murder ClubSeries | — | 54 |
| 2007 | Pushing DaisiesSeries | Detective Puget | 54 |
| 2005 | SupernaturalSeries | Wayne Whittaker Jr. | 52 |
| 2005 | BonesSeries | Dr. Lawrence Rozran | 52 |
| 2005 | The CloserSeries | Mr. Sheffield | 52 |
| 2005 | Grey's AnatomySeries | Mr. Nelligan | 52 |
| 2005 | Ben 10Series | Leader Alien (voice) | 52 |
| 2005 | E-RingSeries | — | 52 |
| 2005 | Masters of HorrorSeries | — | 52 |
| 2005 | HomecomingMovie | Kurt Rand | 52 |
| 2004 | CSI: NYSeries | Sheriff Benson | 51 |
| 2004 | Stargate AtlantisSeries | Richard Woolsey | 51 |
| 2004 | The 4400Series | Trent Appelbaum | 51 |
| 2004 | Justice League UnlimitedSeries | Amazo (voice) | 51 |
| 2003 | Cold CaseSeries | Arthur Lennox | 50 |
| 2003 | The O.C.Series | Bill Merriam | 50 |
| 2003 | NCISSeries | Dale Harding | 50 |
| 2003 | EveSeries | Professor Dunson | 50 |
| 2003 | Looney Tunes: Back in ActionMovie | Acme VP, Rhetorical Questions | 50 |
| 2003 | The Lyon's DenSeries | — | 50 |
| 2002 | The Dead ZoneSeries | Mitch McMurtry | 49 |
| 2002 | Creating a Myth... the Memories of 'Legend'Movie | Himself | 49 |
| 2001 | SmallvilleSeries | Edward Teague | 48 |
| 2001 | Justice LeagueSeries | Amazo (voice) | 48 |
| 2001 | Crossing JordanSeries | Bruno Casnelli | 48 |
| 2001 | The Amati GirlsMovie | Grace's Doctor | 48 |
| 2000 | Buzz Lightyear of Star CommandSeries | Professor Reddschift (voice) | 47 |
| 1999 | The West WingSeries | E. Bradford Shelton | 46 |
| 1999 | Star Trek: Voyager - Dark FrontierMovie | The Doctor | 46 |
| 1998 | Small SoldiersMovie | Ralph, Clean Room Technician | 45 |
| 1998 | Seven DaysSeries | — | 45 |
| 1997 | Cow and ChickenSeries | President / Puppet President (voice) | 44 |
| 1997 | Ally McBealSeries | Barry Philbrick | 44 |
| 1997 | The PracticeSeries | Dr. Edmunds | 44 |
| 1997 | Stargate SG-1Series | Richard Woolsey | 44 |
| 1997 | The Second Civil WarMovie | Godfrey | 44 |
| 1996 | Sabrina, the Teenage WitchSeries | Bob Jacobs | 43 |
| 1996 | Early EditionSeries | Doctor | 43 |
| 1996 | Star Trek: First ContactMovie | Enterprise EMH | 43 |
| 1996 | Star Trek: 30 Years and BeyondMovie | Self | 43 |
| 1995 | The Outer LimitsSeries | Emmet Harley | 42 |
| 1995 | Star Trek: VoyagerSeries | The Doctor | 42 |
| 1995 | What a Cartoon!Series | Pfish (voice) | 42 |
| 1995 | Dumb and DumberSeries | Chief (voice) | 42 |
| 1995 | Out ThereMovie | Walter Danverstein (uncredited) | 42 |
| 1995 | The Savage DragonSeries | (voice) | 42 |
| 1995 | VR.5Series | — | 42 |
| 1994 | ERSeries | Abraham Zimble | 41 |
| 1994 | Rebel HighwaySeries | Mr. Cahn | 41 |
| 1994 | Revenge of the Nerds IV: Nerds in LoveMovie | Chad Penrod | 41 |
| 1994 | The PagemasterMovie | Pirate (voice) | 41 |
| 1994 | Wagons East!Movie | Ben Wheeler | 41 |
| 1993 | FrasierSeries | Charlie Koechner | 40 |
| 1993 | Star Trek: Deep Space NineSeries | Dr. Lewis Zimmerman / EMH Mark I | 40 |
| 1993 | The Adventures of Brisco County, Jr.Series | Puel | 40 |
| 1993 | MatineeMovie | Howard | 40 |
| 1993 | Fatal Deception: Mrs. Lee Harvey OswaldMovie | David Lifton | 40 |
| 1992 | Batman: The Animated SeriesSeries | Eddie G. (voice) | 39 |
| 1992 | SamanthaMovie | Neil Otto | 39 |
| 1992 | Deadly MatrimonyMovie | Prosecutor | 39 |
| 1991 | MotoramaMovie | Jerry the Policeman | 38 |
| 1991 | Home ImprovementSeries | Joe Morton | 38 |
| 1991 | DinosaursSeries | Clerk (voice) | 38 |
| 1991 | Frame UpMovie | Frank Govers | 38 |
| 1991 | L.A. StoryMovie | Voicephone (voice) (uncredited) | 38 |
| 1990 | Gremlins 2: The New BatchMovie | Forster | 37 |
| 1990 | Total RecallMovie | Johnnycab (voice) | 37 |
| 1989 | Tales from the CryptSeries | Frank Bobo | 36 |
| 1989 | The 'BurbsMovie | Joe, Garbageman #2 | 36 |
| 1989 | The Cover Girl and the CopMovie | Denise's Date | 36 |
| 1989 | LoverboyMovie | Dr. Reed Palmer | 36 |
| 1988 | The Wonder YearsSeries | Coach Cutlip | 35 |
| 1988 | China BeachSeries | Dick Richard | 35 |
| 1988 | Jack's BackMovie | Dr. Carlos Battera | 35 |
| 1988 | Dead HeatMovie | Lt. Herzog | 35 |
| 1987 | Amazon Women on the MoonMovie | Rick Raddnitz (segment "Roast Your Loved One") | 34 |
| 1987 | 21 Jump StreetSeries | Ralph Buckley | 34 |
| 1987 | Bates MotelMovie | Dr. Goodman | 34 |
| 1987 | The Man Who Fell to EarthMovie | Agent Richard Morse | 34 |
| 1987 | Paul Reiser: Out on a WhimMovie | — | 34 |
| 1987 | Mr. PresidentSeries | Reinbeck | 34 |
| 1987 | InnerspaceMovie | The Cowboy | 34 |
| 1986 | L.A. LawSeries | John Dunphy | 33 |
| 1986 | Back to SchoolMovie | Giorgio | 33 |
| 1986 | ThrobSeries | — | 33 |
| 1985 | Amazing StoriesSeries | Tony Sepulveda | 32 |
| 1985 | The Golden GirlsSeries | Dr. Revell | 32 |
| 1985 | ExplorersMovie | Starkiller / Wak / Wak and Neek's Father | 32 |
| 1985 | LegendMovie | Meg Mucklebones | 32 |
| 1983 | Scarecrow and Mrs. KingSeries | — | 30 |
| 1983 | The Other WomanMovie | Chuchi | 30 |
| 1983 | Star 80Movie | Interviewer | 30 |
| 1982 | NewhartSeries | — | 29 |
| 1982 | St. ElsewhereSeries | Eli Muzzy | 29 |
| 1982 | Silver SpoonsSeries | Louis Morgan | 29 |
| 1982 | Lois Gibbs and the Love CanalMovie | Larry McGuinness | 29 |
| 1981 | Golden GateMovie | — | 28 |
| 1981 | The Violation of Sarah McDavidMovie | Scott Crowell | 28 |
| 1981 | The HowlingMovie | Eddie Quist | 28 |
| 1979 | Archie Bunker's PlaceSeries | — | 26 |
| 1978 | TaxiSeries | Philip Polevoy | 25 |
| 1976 | AliceSeries | — | 23 |
| 1973 | KojakSeries | Thomas Rindone | 20 |
| 0 | Bad News on the DoorstepMovie | — | — |