Filmography95 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2024 | Christmas Under the Northern LightsMovie | Doug | 74 |
| 2023 | Babylon 5: The Road HomeMovie | John Sheridan (voice) | 73 |
| 2023 | A Gettysburg ChristmasMovie | Ron | 73 |
| 2020 | Roux the Day: A Gourmet Detective MysteryMovie | Jim Ross | 70 |
| 2019 | Holiday DateMovie | Walter | 69 |
| 2017 | The OrvilleSeries | President Alcuzan | 67 |
| 2016 | Double MommyMovie | Scott | 66 |
| 2015 | SupergirlSeries | President Baker | 65 |
| 2013 | Cedar CoveSeries | Bob Beldon | 63 |
| 2013 | The Thanksgiving HouseMovie | Parker Mather | 63 |
| 2012 | TRON: UprisingSeries | Tron | 62 |
| 2012 | GCBSeries | Burl Lourd | 62 |
| 2011 | 51Movie | Col. Martin | 61 |
| 2011 | TRON: The Next DayMovie | Alan Bradley | 61 |
| 2010 | TRON: LegacyMovie | Alan Bradley / Tron | 60 |
| 2009 | Celebrity Ghost StoriesSeries | Self | 59 |
| 2008 | Aces 'N' EightsMovie | D.C. Cracker | 58 |
| 2008 | Dead Space: DownfallMovie | Colin Barrow (voice) | 58 |
| 2008 | Bone EaterMovie | Sheriff Steve Evans | 58 |
| 2007 | ChuckSeries | Dr. Woody Woodcomb | 57 |
| 2007 | The Pixar StoryMovie | Tron (archive footage) | 57 |
| 2007 | Babylon 5: The Lost Tales - Voices in the DarkMovie | President John Sheridan | 57 |
| 2007 | 07 SpaceysMovie | — | 57 |
| 2007 | SharpshooterMovie | Sheriff Garner | 57 |
| 2006 | HeroesSeries | Robert Malden | 56 |
| 2006 | Falling in Love with the Girl Next DoorMovie | Frank Lucas | 56 |
| 2005 | Commander in ChiefSeries | Tucker Hayes | 55 |
| 2005 | American Dad!Series | Bruce Boxleitner (voice) | 55 |
| 2005 | Arthur Hailey's DetectiveMovie | Ketledge | 55 |
| 2004 | Special Report: Zombie InvasionMovie | The President | 54 |
| 2004 | They Are Among UsMovie | Hugh | 54 |
| 2004 | The Tony Danza ShowSeries | Self - Guest | 54 |
| 2004 | Snakehead TerrorMovie | Sheriff Patrick James | 54 |
| 2004 | Saving EmilyMovie | Gregory | 54 |
| 2003 | Cold CaseSeries | Huck Oberland | 53 |
| 2003 | NCISSeries | C. Clifford Chase | 53 |
| 2003 | Gods and GeneralsMovie | Lt. Gen. James Longstreet | 53 |
| 2003 | The Only WitnessMovie | Nicholas Preston | 53 |
| 2002 | She SpiesSeries | Chairman | 52 |
| 2002 | The Making of TRONMovie | Himself | 52 |
| 2002 | ContagionMovie | President Howard | 52 |
| 2002 | Hope RanchMovie | J.T. Hope | 52 |
| 2001 | Crossing JordanSeries | Foster Eldridge | 51 |
| 2001 | Life in the BalanceMovie | — | 51 |
| 2000 | The Perfect NannyMovie | Dr. Robert Lewis | 50 |
| 1999 | Twice in a LifetimeSeries | Ray Patterson / Dr. Goode | 49 |
| 1999 | Babylon 5: A Call to ArmsMovie | John J. Sheridan | 49 |
| 1998 | Babylon 5: In the BeginningMovie | John J. Sheridan | 48 |
| 1998 | Babylon 5: ThirdspaceMovie | Capt. John J. Sheridan | 48 |
| 1996 | Me And My HormonesMovie | Mr. Mahar | 46 |
| 1995 | The Outer LimitsSeries | Senator Wyndom Brody | 45 |
| 1994 | Touched by an AngelSeries | Scott Tanner | 44 |
| 1994 | Babylon 5Series | John Sheridan | 44 |
| 1994 | Wyatt Earp: Return to TombstoneMovie | Sam, Sheriff of Cochise County | 44 |
| 1993 | House of SecretsMovie | Dr. Frank Ravinel | 43 |
| 1992 | KuffsMovie | Brad Kuffs | 42 |
| 1992 | The BabeMovie | Jumpin' Joe Dugan | 42 |
| 1992 | The SecretMovie | Patrick Dunmore | 42 |
| 1991 | Murderous VisionMovie | Detective Kyle Robeshaw | 41 |
| 1991 | Diplomatic ImmunityMovie | Cole Hickel | 41 |
| 1989 | Tales from the CryptSeries | Winton Robbins | 39 |
| 1989 | From the Dead of NightMovie | Peter Langford | 39 |
| 1989 | Judith Krantz's Till We Meet AgainSeries | Jock Hampton | 39 |
| 1989 | The Road RaidersMovie | Charlie | 39 |
| 1988 | Red RiverMovie | Matthew Garth | 38 |
| 1987 | The Gambler: The Legend ContinuesMovie | Billy Montana | 37 |
| 1987 | Passion FlowerMovie | Larry Janson | 37 |
| 1987 | Angel in GreenMovie | Captain William Wicker | 37 |
| 1986 | Louis L'Amour's Down the Long HillsMovie | Scott Collins | 36 |
| 1986 | The Return of Mickey Spillane's Mike HammerMovie | Bruce Boxleitner | 36 |
| 1983 | Scarecrow and Mrs. KingSeries | Lee Stetson | 33 |
| 1983 | The Gambler: The Adventure ContinuesMovie | Billy Montana | 33 |
| 1983 | The Gambler: The Adventure ContinuesSeries | Billy Montana | 33 |
| 1983 | I Married Wyatt EarpMovie | Wyatt Earp | 33 |
| 1982 | TronMovie | Alan Bradley / Tron | 32 |
| 1982 | Bare EssenceSeries | Chase Marshall | 32 |
| 1981 | Fly Away HomeMovie | Carl Danton | 31 |
| 1981 | East of EdenSeries | Charles Trask | 31 |
| 1980 | Wild TimesSeries | Vern Tyree | 30 |
| 1980 | The GamblerMovie | Billy Montana | 30 |
| 1980 | The Baltimore BulletMovie | Billie Joe Robbins | 30 |
| 1979 | The Last ConvertibleSeries | George Virdon | 29 |
| 1978 | Happily Ever AfterMovie | Jack Gregory | 28 |
| 1977 | How the West Was WonSeries | Luke Macahan | 27 |
| 1976 | Battle of the Network StarsSeries | Himself - CBS Team | 26 |
| 1976 | Kiss Me... Kill MeMovie | Douglas Lane | 26 |
| 1976 | The MacahansMovie | Seth Macahan | 26 |
| 1975 | BarettaSeries | Dom | 25 |
| 1975 | A Cry for HelpMovie | Richie Danko | 25 |
| 1975 | Sixpack AnnieMovie | Bobby Joe | 25 |
| 1974 | Police WomanSeries | Ed Krohl | 24 |
| 1974 | The Chadwick FamilyMovie | Danny | 24 |
| 1970 | The Mary Tyler Moore ShowSeries | Rick Welch | 20 |
| 1968 | Hawaii Five-OSeries | Kevin Caulder | 18 |
| 1955 | GunsmokeSeries | Toby Hogue | 5 |