| Movie | 1957 | The 27th Day | Jonathan Clark | |
| Movie | 1956 | The Houston Story | Frank Duncan | |
| Movie | 1954 | Naked Alibi | Al Willis | |
| Movie | 1979 | Guyana: Crime of the Century | Congressman Lee O'Brien | |
| Movie | 1957 | Forty Guns | Wes Bonell | |
| Movie | 1956 | Back from Eternity | Jud Ellis | |
| Movie | 1958 | Thunder Road | Troy Barrett | |
| Movie | 2004 | Los Angeles Plays Itself | Dr. Clayton Forrester in The War of The Worlds (archive footage) | |
| Movie | 2002 | The Men Who Made the Movies: Samuel Fuller | Wes Bonnell (archive footage) (uncredited) | |
| Movie | 1952 | The Atomic City | Dr. Frank Addison | |
| Movie | 1957 | China Gate | Sgt. Brock | |
| Movie | 2001 | These Old Broads | Mr. Stern | |
| Movie | 1953 | The Girls of Pleasure Island | Capt. Beaton | |
| Movie | 1981 | The Adventures of Nellie Bly | John Cockerill | |
| Movie | 1955 | The Purple Mask | Captain Charles Laverne | |
| Movie | 1954 | Alaska Seas | Verne Williams | |
| Movie | 1958 | Hong Kong Confidential | Agent Casey Reed | |
| Movie | 1953 | Those Redheads from Seattle | Johnny Kisco | |
| Movie | 1967 | Maroc 7 | Simon Grant | |
| Movie | 1971 | The Devil and Miss Sarah | Rankin | |
| Movie | 2005 | War of the Worlds | Grandfather | |
| Movie | 1974 | The Second Coming of Suzanne | Jackson Sinclair, the TV Commentator | |
| Movie | 1968 | Subterfuge | Michael A. Donovan | |
| Movie | 1969 | Istanbul Express | Michael London | |
| Movie | 1981 | The Girl, the Gold Watch & Dynamite | Andrew Stovall | |
| Movie | 1971 | Do You Take This Stranger? | Murray Jarvis | |
| Movie | 1979 | Abraham's Sacrifice | Abraham | |
| Movie | 1954 | Red Garters | Rafael Moreno | |
| Movie | 1955 | Soldier of Fortune | Louis Hoyt | |
| Movie | 1980 | A Cry for Love | Gordon Harris | |
| Movie | 1968 | Prescription: Murder | Dr. Ray Flemming | |
| Movie | 1989 | Turn Back the Clock | John Forrest | |
| Movie | 1987 | Perry Mason: The Case of the Lost Love | Glenn Robertson | |
| Movie | 2005 | The Sky Is Falling: Making 'The War of the Worlds' | Self | |
| Movie | 1953 | The War of the Worlds | Clayton Forrester | |
| Movie | 2007 | Tim Conway: Timeless Comedy | Self | |
| Movie | 1977 | Ransom for Alice! | Harry Darew | |
| Movie | 1987 | Happy 100th Birthday, Hollywood | Self | |
| Movie | 1991 | The Gambler Returns: The Luck of the Draw | Bat Masterson | |
| Movie | 1957 | Ain't No Time for Glory | Lt. Roy Koalton | |
| Movie | 2022 | Way of Tomorrow: The Evolution of Science Fiction Movies | Self - (archive footage) | |
| TV Show | 1963 | Burke's Law | Captain Amos Burke | 81 |
| TV Show | 1985 | The Twilight Zone | Prince of Darkness (segment "Time and Teresa Golowitz") | 1 |
| TV Show | 1988 | My Secret Identity | | 1 |
| TV Show | 1976 | Charlie's Angels | Frank Jason | 1 |
| TV Show | 1953 | General Electric Theater | Mike Thompson | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Del Delaney | 1 |
| TV Show | 1984 | Crazy like a Fox | Nicholas Roland | 1 |
| TV Show | 1972 | The Adventurer | Gene Bradley | 26 |
| TV Show | 1955 | The Millionaire | Steve Carey | 1 |
| TV Show | 1964 | The Hollywood Palace | Self | 4 |
| TV Show | 1950 | Lux Video Theatre | Cosgrove / Griggsy | 1 |
| TV Show | 1960 | Pete and Gladys | | 1 |
| TV Show | 1956 | The Dinah Shore Chevy Show | Self | 3 |
| TV Show | 1958 | Bat Masterson | Bat Masterson | 108 |
| TV Show | 1949 | Suspense | | 1 |
| TV Show | 1981 | Aloha Paradise | | 1 |
| TV Show | 1956 | The Steve Allen Show | Self - Bat Masterson | 1 |
| TV Show | 1953 | Letter to Loretta | David Mason | 1 |
| TV Show | 1965 | Amos Burke: Secret Agent | | 17 |
| TV Show | 1994 | Burke's Law | Amos Burke | 27 |
| TV Show | 1954 | Studio 57 | | 1 |
| TV Show | 1956 | Tony Awards | Self - Performer | 1 |
| TV Show | 1968 | The Name of the Game | Glenn Howard | 31 |
| TV Show | 1955 | Alfred Hitchcock Presents | Dan Varrel | 1 |
| TV Show | 1977 | Aspen | Carl Osborne | 3 |
| TV Show | 1976 | Charlie's Angels | Steve Moss | 1 |
| TV Show | 1988 | Paradise | Bat Masterson | 1 |
| TV Show | 1977 | The Love Boat | Alfred Newberry | 1 |
| TV Show | 1977 | The Love Boat | Ted Anderson | 1 |
| TV Show | 1977 | The Love Boat | Wade Hubbard | 1 |
| TV Show | 1984 | Murder, She Wrote | Henry Reynard | 1 |
| TV Show | 1962 | The Alfred Hitchcock Hour | John Chambers | 1 |
| TV Show | 1955 | The 20th Century Fox Hour | Lieutenant Eddie Pfeiffer | 1 |
| TV Show | 1978 | Fantasy Island | Neville Quinn | 1 |
| TV Show | 1961 | The Mike Douglas Show | Self - Co-Host | 1 |
| TV Show | 1956 | Tony Awards | Self | 1 |