Filmography106 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2023 | Carol & the End of the WorldSeries | (voice) | 80 |
| 2023 | That '90s ShowSeries | Red Forman | 80 |
| 2022 | In Search of TomorrowMovie | Self - Interviewee | 79 |
| 2022 | The DropoutSeries | David Boies | 79 |
| 2022 | FirestarterMovie | Dr. Joseph Wanless | 79 |
| 2021 | Ultra City SmithsSeries | Carpenter K. Smith (voice) | 78 |
| 2021 | Monsters at WorkSeries | Alistair Clawbottom (voice) | 78 |
| 2021 | Power On: The Story of XboxSeries | Self (archive footage) (uncredited) | 78 |
| 2020 | Business EthicsMovie | Magnus Hardcastle | 77 |
| 2019 | The Movies That Made UsSeries | Self | 76 |
| 2019 | Perpetual Grace LTDSeries | Uncle Dave | 76 |
| 2019 | Perfect HarmonySeries | Tinsley | 76 |
| 2017 | Future ManSeries | Vise | 74 |
| 2017 | El Camino ChristmasMovie | Sheriff Bob Fuller | 74 |
| 2017 | Amityville: The AwakeningMovie | Dr. Milton | 74 |
| 2016 | The RanchSeries | Sam Peterson | 73 |
| 2015 | Marvel's Agent CarterSeries | Vernon Masters | 72 |
| 2015 | Regular Show: The MovieMovie | Gene (voice) | 72 |
| 2014 | Tim and Eric's Bedtime StoriesSeries | Father Krang | 71 |
| 2014 | ResurrectionSeries | Henry Langston | 71 |
| 2013 | Rick and MortySeries | General Nathan (voice) | 70 |
| 2013 | TurboMovie | Indy CEO (voice) | 70 |
| 2013 | MaronSeries | Tier 4 | 70 |
| 2013 | Beware the BatmanSeries | Lieutenant James Gordon (voice) | 70 |
| 2012 | HitchcockMovie | Geoffrey Shurlock | 69 |
| 2012 | Robot and MonsterSeries | Mr. Wheelie (voice) | 69 |
| 2011 | SuitsSeries | Ted Tucker | 68 |
| 2011 | Love BitesSeries | Ed Strathmore | 68 |
| 2011 | CHAOSSeries | H.J. Higgins | 68 |
| 2011 | Green Lantern: The Animated SeriesSeries | Shyir Rev (voice) | 68 |
| 2010 | Regular ShowSeries | Gene (voice) | 67 |
| 2010 | Neighbors from HellSeries | Don Killbride | 67 |
| 2009 | Starz Inside - Unforgettably EvilMovie | Self | 66 |
| 2009 | Green Lantern: First FlightMovie | Kanjar Ro (voice) | 66 |
| 2008 | Childrens HospitalSeries | Ben Hayflick | 65 |
| 2007 | Thank God You're HereSeries | Self | 64 |
| 2006 | PsychSeries | Brett Connors | 63 |
| 2006 | Squirrel BoySeries | — | 63 |
| 2005 | Robot ChickenSeries | — | 62 |
| 2005 | MediumSeries | Edward Cooper | 62 |
| 2005 | The Trouble with Dee DeeMovie | William Rutherford | 62 |
| 2004 | HouseSeries | Dr. Obyedkov | 61 |
| 2002 | Fillmore!Series | — | 59 |
| 2001 | 24Series | Senator Blaine Mayer | 58 |
| 2001 | Justice LeagueSeries | Prosecutor (voice) | 58 |
| 2001 | UC: UndercoverSeries | — | 58 |
| 2001 | Gary & MikeSeries | Officer Dick (voice) | 58 |
| 2000 | Malcolm in the MiddleSeries | Principal Block | 57 |
| 1999 | Girl, InterruptedMovie | Dr. Crumble | 56 |
| 1999 | Batman BeyondSeries | Agent Bennett (voice) | 56 |
| 1998 | That '70s ShowSeries | Red Forman | 55 |
| 1998 | Deep ImpactMovie | Otis Hefter | 55 |
| 1998 | The Magnificent SevenSeries | Col. Emmett Anderson | 55 |
| 1998 | A Bright Shining LieMovie | General Westmoreland | 55 |
| 1997 | The ViewSeries | Self | 54 |
| 1997 | Men in Black: The SeriesSeries | Forbus (voice) | 54 |
| 1996 | A Time to KillMovie | Stump Sisson | 53 |
| 1996 | 3rd Rock from the SunSeries | Jacob | 53 |
| 1996 | E! True Hollywood StorySeries | Self | 53 |
| 1996 | Citizen RuthMovie | Norm Stoney | 53 |
| 1996 | Broken ArrowMovie | Secretary of Defense Baird | 53 |
| 1995 | Star Trek: VoyagerSeries | Annorax | 52 |
| 1995 | Under Siege 2: Dark TerritoryMovie | General Stanley Cooper | 52 |
| 1995 | To Die ForMovie | Earl Stone | 52 |
| 1995 | Last of the DogmenMovie | Sheriff Deegan | 52 |
| 1994 | While Justice SleepsMovie | Leonard Rosenglass | 51 |
| 1994 | Dead on SightMovie | Julian Thompson | 51 |
| 1993 | The X-FilesSeries | Agent Bill Patterson | 50 |
| 1993 | Star Trek: Deep Space NineSeries | Thrax | 50 |
| 1993 | Boxing HelenaMovie | Dr. Alan Harrison | 50 |
| 1993 | The CrushMovie | Cliff Forrester | 50 |
| 1993 | DoorwaysMovie | Traeger | 50 |
| 1993 | Heart and SoulsMovie | Patterson (uncredited) | 50 |
| 1992 | FortressMovie | Prison Director Poe | 49 |
| 1992 | The Please Watch the Jon Lovitz Special, Live!Movie | Self | 49 |
| 1991 | Star Trek VI: The Undiscovered CountryMovie | Federation President | 48 |
| 1991 | Shadows and FogMovie | Vogel's Follower | 48 |
| 1991 | OscarMovie | Lt. Toomey, Chicago PD | 48 |
| 1991 | Company BusinessMovie | Elliot Jaffe | 48 |
| 1990 | Quick ChangeMovie | Russ Crane / Lombino | 47 |
| 1990 | 12:01 PMMovie | Myron Castleman | 47 |
| 1989 | The SimpsonsSeries | Hub's Father (voice) | 46 |
| 1989 | Dead Poets SocietyMovie | Mr. Perry | 46 |
| 1989 | True BelieverMovie | Robert Reynard | 46 |
| 1989 | Heart of DixieMovie | Professor Flournoy | 46 |
| 1988 | Rambo IIIMovie | Griggs | 45 |
| 1987 | 21 Jump StreetSeries | Spencer Phillips | 44 |
| 1987 | RoboCopMovie | Clarence Boddicker | 44 |
| 1987 | The New Adventures of Beans BaxterSeries | Mr. Sue | 44 |
| 1986 | It's Garry Shandling's ShowSeries | Paul Bosgang | 43 |
| 1986 | The Christmas GiftMovie | Jake Richards | 43 |
| 1986 | The Delos AdventureMovie | Arthur McNeil | 43 |
| 1985 | The Midnight HourMovie | Captain Warren Jensen | 42 |
| 1985 | Deadly MessagesMovie | Lieutenant Burton | 42 |
| 1984 | FlashpointMovie | Carson | 41 |
| 1984 | Blue ThunderSeries | Bill Spradley | 41 |
| 1983 | The A-TeamSeries | Mr. Carson | 40 |
| 1983 | The RenegadesSeries | Captain Scanlon | 40 |
| 1983 | Going BerserkMovie | Clarence | 40 |
| 1983 | Staying AliveMovie | Choreographer | 40 |
| 1983 | Missing PiecesMovie | Sincoff | 40 |
| 1982 | NewhartSeries | — | 39 |
| 1982 | The RenegadesMovie | Capt. Frank Scanlon | 39 |
| 1981 | Zoot SuitMovie | Sergeant Smith | 38 |
| 1977 | Lou GrantSeries | DeRopp | 34 |
| 0 | DoorwaysSeries | — | — |