Filmography60 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2018 | 9-1-1Series | William Schneider | 79 |
| 2016 | American Crime StorySeries | Lee Miglin | 77 |
| 2015 | The SeventiesSeries | Self | 76 |
| 2006 | Superman: Brainiac AttacksMovie | Jonathan Kent (voice) | 67 |
| 2005 | SupernaturalSeries | Fred Jones | 66 |
| 2005 | Ghost WhispererSeries | Bill Jett | 66 |
| 2004 | Desperate HousewivesSeries | Milton Lang | 65 |
| 2004 | Justice League UnlimitedSeries | Jonathan Kent / Brainiac (voice) | 65 |
| 2003 | NCISSeries | Miles Deakin | 64 |
| 2002 | Without a TraceSeries | Ross Anderson | 63 |
| 2001 | Justice LeagueSeries | Jonathan Kent / Store Owner (voice) | 62 |
| 1999 | Law & Order: Special Victims UnitSeries | Jonah Malcolm | 60 |
| 1999 | ProvidenceSeries | Jim Hansen | 60 |
| 1997 | Sins of the MindMovie | William | 58 |
| 1996 | E! True Hollywood StorySeries | — | 57 |
| 1996 | Superman: The Animated SeriesSeries | Jonathan Kent (voice) | 57 |
| 1996 | Superman: The Last Son of KryptonMovie | Jonathan Kent (voice) | 57 |
| 1995 | The Killers WithinMovie | Congressman Clayton | 56 |
| 1994 | Hart to Hart: Old Friends Never DieMovie | Frank Crane | 55 |
| 1991 | The Whereabouts of JennyMovie | Van Zandt | 52 |
| 1989 | CoachSeries | Jeffrey | 50 |
| 1989 | Incident at Dark RiverMovie | Tim McFall | 50 |
| 1986 | MatlockSeries | Judge David Bennett | 47 |
| 1984 | Murder, She WroteSeries | Drew Borden | 45 |
| 1983 | Choices of the HeartMovie | Ambassador Robert E. White | 44 |
| 1983 | Memorial DayMovie | Matt Walker | 44 |
| 1981 | Making 'M*A*S*H'Movie | Self | 42 |
| 1980 | Damien: The Leper PriestMovie | William Robertson | 41 |
| 1979 | Sex and the Single ParentMovie | George McGee | 40 |
| 1978 | BatteredMovie | Michael Hawks | 39 |
| 1974 | The Six Million Dollar ManSeries | David Tate | 35 |
| 1974 | Harry OSeries | — | 35 |
| 1974 | Dinah!Series | Self | 35 |
| 1974 | Live Again, Die AgainMovie | James Carmichael | 35 |
| 1973 | Nightmare StepMovie | Steven | 34 |
| 1972 | The Sixth SenseSeries | — | 33 |
| 1972 | M*A*S*HSeries | B. J. Hunnicutt | 33 |
| 1972 | BanacekSeries | Jason Trotter | 33 |
| 1972 | Ghost StorySeries | Frank Simmons | 33 |
| 1971 | Owen Marshall: Counselor at LawSeries | Blair Cameron | 32 |
| 1971 | CannonSeries | — | 32 |
| 1969 | Love, American StyleSeries | Young Man | 30 |
| 1969 | The Bill Cosby ShowSeries | Al Socconis | 30 |
| 1969 | The Bold Ones: The New DoctorsSeries | Dr. Vic Wheelwright | 30 |
| 1968 | TargetsMovie | Man in Phonebooth | 29 |
| 1967 | IronsideSeries | — | 28 |
| 1967 | The GraduateMovie | Hotel Lobby Bellhop (uncredited) | 28 |
| 1967 | MannixSeries | Clay Riegles | 28 |
| 1967 | Garrison's GorillasSeries | — | 28 |
| 1967 | CountdownMovie | Houston Engineer (uncredited) | 28 |
| 1966 | The MonkeesSeries | Agent Modell | 27 |
| 1965 | I Dream of JeannieSeries | Arland | 26 |
| 1964 | Daniel BooneSeries | Johnson | 25 |
| 1963 | Captain Newman, M.D.Movie | Patient (uncredited) | 24 |
| 1962 | Combat!Series | Doctor | 23 |
| 1962 | McHale's NavySeries | The Gunner | 23 |
| 1962 | Ensign O'TooleSeries | Ferguson | 23 |
| 1961 | The Mike Douglas ShowSeries | Self | 22 |
| 1961 | The Dick Powell ShowSeries | Young Couple Boy | 22 |
| 1954 | LassieSeries | — | 15 |