Filmography69 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2004 | Los Angeles Plays ItselfMovie | George Matthews in Model Shop (archive footage) | 67 |
| 1995 | Night of the ScarecrowMovie | William | 58 |
| 1993 | Terror in ParadiseMovie | Major Douglas | 56 |
| 1987 | The Wild PairMovie | Capt. Kramer | 50 |
| 1987 | The Return of the Six-Million-Dollar Man and the Bionic WomanMovie | John Praiser | 50 |
| 1985 | MacGyverSeries | Grant | 48 |
| 1985 | Half NelsonMovie | — | 48 |
| 1984 | Murder, She WroteSeries | Sam Mercer | 47 |
| 1984 | Murder, She WroteSeries | Tom Carpenter | 47 |
| 1984 | Finder of Lost LovesSeries | Stan Gallagher | 47 |
| 1984 | Cover UpSeries | — | 47 |
| 1983 | Scarecrow and Mrs. KingSeries | — | 46 |
| 1983 | Emergency RoomMovie | Dr. David Becker | 46 |
| 1983 | Survival ZoneMovie | Ben | 46 |
| 1982 | HotelSeries | — | 45 |
| 1982 | T. J. HookerSeries | Sgt. Carey Dunston | 45 |
| 1982 | Matt HoustonSeries | Dr. Owen Denny | 45 |
| 1981 | Simon & SimonSeries | — | 44 |
| 1981 | The Girl, the Gold Watch & DynamiteMovie | Sheriff Earl Baker | 44 |
| 1980 | Top of the HillSeries | Dave Cully | 43 |
| 1979 | Trapper John, M.D.Series | — | 42 |
| 1979 | The Incredible Journey of Doctor Meg LaurelMovie | Harley Moon | 42 |
| 1979 | Hart to HartSeries | — | 42 |
| 1978 | Vega$Series | — | 41 |
| 1978 | The Ghost of Flight 401Movie | Jordan Evanhower | 41 |
| 1977 | HunterSeries | John DeLacey | 40 |
| 1977 | Bad Georgia RoadMovie | Leroy Hastings | 40 |
| 1976 | Charlie's AngelsSeries | Claude | 39 |
| 1976 | The Bionic WomanSeries | — | 39 |
| 1975 | Starsky & HutchSeries | — | 38 |
| 1975 | The Blue KnightSeries | — | 38 |
| 1975 | Three for the RoadSeries | — | 38 |
| 1974 | The Six Million Dollar ManSeries | John Hopper | 37 |
| 1974 | ManhunterMovie | Frank Clinger | 37 |
| 1973 | Police StorySeries | — | 36 |
| 1973 | Barnaby JonesSeries | Howard Lee | 36 |
| 1972 | The Streets of San FranciscoSeries | Charley Belasco | 35 |
| 1972 | BanacekSeries | Owen Russell | 35 |
| 1971 | CannonSeries | — | 34 |
| 1971 | Earth IIMovie | David Seville | 34 |
| 1970 | Night GallerySeries | James Figg | 33 |
| 1970 | R.P.M.Movie | Rossiter | 33 |
| 1969 | Medical CenterSeries | Lorenz | 32 |
| 1969 | Love, American StyleSeries | Ernie | 32 |
| 1969 | Model ShopMovie | George Matthews | 32 |
| 1968 | Hawaii Five-OSeries | Kelsey | 31 |
| 1968 | They Came to Rob Las VegasMovie | Tony Ferris | 31 |
| 1968 | FirecreekMovie | Earl | 31 |
| 1968 | 2001: A Space OdysseyMovie | Dr. Frank Poole | 31 |
| 1966 | Mission: ImpossibleSeries | Nicholas Varsi | 29 |
| 1966 | Star TrekSeries | Lt. Cmdr. Gary Mitchell | 29 |
| 1966 | 2001: A Space Odyssey - A Look Behind the FutureMovie | Self | 29 |
| 1965 | The F.B.I.Series | Ben Sillman | 28 |
| 1965 | The Legend of Jesse JamesSeries | Clint Bethard | 28 |
| 1963 | Kraft Suspense TheatreSeries | Frank Connery | 26 |
| 1963 | The LieutenantSeries | Lt. William 'Bill' Rice | 26 |
| 1963 | It Happened at the World's FairMovie | Danny Burke | 26 |
| 1962 | Combat!Series | Sgt. Meider | 25 |
| 1962 | The Magic SwordMovie | Sir George | 25 |
| 1961 | Splendor in the GrassMovie | Allen 'Toots' Tuttle | 24 |
| 1961 | Follow the SunSeries | — | 24 |
| 1961 | Bus StopSeries | Bo | 24 |
| 1960 | Tall StoryMovie | Russian basketball player | 23 |
| 1960 | Tall StoryMovie | Russian Basketball Player (uncredited) | 23 |
| 1959 | WarlockMovie | Gang Member (uncredited) | 22 |
| 1957 | Perry MasonSeries | Davey Carroll | 20 |
| 1957 | Perry MasonSeries | Young Policeman (uncredited) | 20 |
| 1955 | GunsmokeSeries | Jim Stark | 18 |
| 1954 | Summer PlayhouseSeries | — | 17 |