| Movie | 1950 | All About Eve | Bill Sampson | |
| Movie | 1952 | Night Without Sleep | Richard Morton | |
| Movie | 1951 | Decision Before Dawn | Col. Devlin | |
| Movie | 1959 | The Wonderful Country | Major Colton | |
| Movie | 1953 | A Blueprint for Murder | Fred Sargent | |
| Movie | 1949 | Slattery's Hurricane | Cmdr E.T. Kramer | |
| Movie | 1966 | Destination Inner Space | Dr. LaSatier | |
| Movie | 1954 | The Human Jungle | John Danforth | |
| Movie | 1954 | Witness to Murder | Police Lt. Lawrence Mathews | |
| Movie | 1949 | Twelve O'Clock High | Colonel Keith Davenport | |
| Movie | 1951 | The Frogmen | Lt. Cmdr. Pete Vincent | |
| Movie | 1960 | The Great Impostor | Pa Demara | |
| Movie | 1968 | The Power | Mark Corlane | |
| Movie | 1967 | The Incident | Douglas McCann | |
| Movie | 1950 | Where the Sidewalk Ends | Tommy Scalise | |
| Movie | 1961 | Mysterious Island | Gideon Spilitt | |
| Movie | 1960 | The Savage Eye | The Poet | |
| Movie | 1951 | Another Man's Poison | George Bates | |
| Movie | 1952 | Phone Call from a Stranger | David Trask | |
| Movie | 1958 | Crash Landing | Captain Steve Williams | |
| Movie | 1971 | Earth II | Walter Dietrich | |
| Movie | 1967 | The Last Challenge | Squint Calloway | |
| Movie | 1961 | The Pleasure of His Company | James Dougherty | |
| Movie | 1967 | Hondo and the Apaches | General Philip Sheridan | |
| Movie | 1954 | The Black Dakotas | Brock Marsh (alias Zachary Paige) | |
| Movie | 1944 | Winged Victory | Captain McIntyre | |
| Movie | 1969 | Then Came Bronson | Inspector Otis | |
| Movie | 1962 | A Girl Named Tamiko | Max Wilson | |
| Movie | 1952 | The Girl in White | Dr. Seth Pawling | |
| Movie | 1950 | Mother Didn't Tell Me | Dr. Peter Roberts | |
| Movie | 1958 | The Missouri Traveler | Doyle Magee | |
| Movie | 1965 | Catacombs | Raymond Garth | |
| Movie | 1973 | Murder and the Computer | Gordon Craig | |
| Movie | 1943 | This Is the Army | Backstage MP on Right (uncredited) | |
| Movie | 1977 | Thieves | Street Man | |
| Movie | 1966 | The Dangerous Days of Kiowa Jones | Marshal Duncan | |
| Movie | 1965 | Around the World Under the Sea | Dr. August 'Gus' Boren | |
| Movie | 1967 | Clambake | Sam Burton | |
| Movie | 1973 | The Murderers | | |
| Movie | 1951 | Rawhide | Narrator (voice) (uncredited) | |
| Movie | 1959 | Rhapsody of Steel | Narrator (voice) | |
| Movie | 1964 | The Searching Eye | Narrator | |
| Movie | 1977 | For Liberty and Union | Self - Narrator (voice) | |
| Movie | 1956 | Navy Wife | Jack Blain | |
| Movie | 1969 | Loving Badly | | |
| Movie | 1977 | World of Darkness | Dr. Thomas Madsen | |
| Movie | 1966 | Ride Beyond Vengeance | Dub Stokes | |
| Movie | 1974 | Huckleberry Finn | Pap | |
| Movie | 1948 | Strange Victory | Narrator | |
| Movie | 1968 | Run, Psycho, Run | George Dennison | |
| Movie | 1973 | Pueblo | Adm. Thomas E. Moorer | |
| Movie | 1966 | In Search of Hart Crane | Narrator (voice) | |
| Movie | 1956 | Bermuda Affair | Bob Scoffield | |
| Movie | 1970 | Secret of the Sacred Forest | Mike Parks | |
| Movie | 1975 | The Zodiac Murders | | |
| Movie | 1957 | If You Knew Elizabeth | Walter Hubbard | |
| Movie | 2021 | Titans of Destruction: The Evolution of Giant Monster Movies | Self - (archive footage) | |
| Movie | 1966 | Atomic Power Today: Service with Safety | Narrator | |
| TV Show | 1966 | The Time Tunnel | Senator Leroy Clark | 1 |
| TV Show | 1974 | Movin' On | | 1 |
| TV Show | 1972 | Kung Fu | Dan Hoyle | 1 |
| TV Show | 1963 | Kraft Suspense Theatre | Mark Jordan | 1 |
| TV Show | 1969 | Marcus Welby, M.D. | Orlando 'Cord' Corday | 1 |
| TV Show | 1969 | Medical Center | | 1 |
| TV Show | 1948 | Studio One | Paul Gormay | 1 |
| TV Show | 1962 | Combat! | Capt. August | 1 |
| TV Show | 1953 | General Electric Theater | McMasters | 1 |
| TV Show | 1971 | Cannon | | 1 |
| TV Show | 1959 | The Twilight Zone | Joseph Paradine | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Sgt. Rockwell | 1 |
| TV Show | 1962 | Sam Benedict | | 1 |
| TV Show | 1960 | Outlaws | | 1 |
| TV Show | 1961 | Bus Stop | | 1 |
| TV Show | 1951 | Schlitz Playhouse of Stars | John Beasley / Nash | 1 |
| TV Show | 1963 | Bob Hope Presents the Chrysler Theatre | | 1 |
| TV Show | 1955 | The 20th Century Fox Hour | | 1 |
| TV Show | 1964 | Profiles in Courage | John Marshall | 1 |
| TV Show | 1967 | Hondo | | 2 |
| TV Show | 1965 | Branded | | 2 |
| TV Show | 1959 | Laramie | | 1 |
| TV Show | 1961 | Ben Casey | | 1 |
| TV Show | 1961 | The New Breed | Karl Lippert | 1 |
| TV Show | 1950 | Robert Montgomery Presents | Felice Benuzzi | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Col. Boyd Nelson | 1 |
| TV Show | 1959 | New York Confidential | | 1 |
| TV Show | 1964 | Reporter | | 11 |
| TV Show | 1957 | Suspicion | | 1 |
| TV Show | 1963 | The Outer Limits | Dr. James Hamilton / Major Roger Brothers | 1 |
| TV Show | 1953 | Letter to Loretta | Bill Masters | 1 |
| TV Show | 1954 | Justice | Jason Tyler | 91 |
| TV Show | 1953 | General Electric Theater | John Dwight | 1 |
| TV Show | 1951 | Schlitz Playhouse of Stars | | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Noah Rawlins | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Luke Cannon | 1 |
| TV Show | 1948 | The Ed Sullivan Show | Self | 1 |
| TV Show | 1979 | The Littlest Hobo | Willie Brogan | 2 |
| TV Show | 1955 | Alfred Hitchcock Presents | Joseph Pond | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Carl Adams | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Ted Franklin | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Cash Bentley | 1 |
| TV Show | 1971 | Young Dr. Kildare | Dr. Leonard Gillespie | 24 |
| TV Show | 1962 | The Alfred Hitchcock Hour | John Pemberton | 1 |
| TV Show | 1962 | The Alfred Hitchcock Hour | Harry Jarvis | 1 |
| TV Show | 1955 | The 20th Century Fox Hour | David Trask | 1 |
| TV Show | N/A | Winston Churchill: The Valiant Years | Narrator | 27 |
| TV Show | 1957 | Alcoa Theatre | Dick Bowen | 1 |
| TV Show | 1979 | The Seekers | Capt. Hull | 2 |