| Movie | 1957 | Paths of Glory | Maj. Saint-Auban | |
| Movie | 1956 | Forbidden Planet | Chief Engineer Quinn | |
| Movie | 1992 | The Player | Richard Anderson | |
| Movie | 1970 | Tora! Tora! Tora! | Captain John B. Earle | |
| Movie | 1966 | Seconds | Dr. Innes | |
| Movie | 1996 | In the Lake of the Woods | Claude Rasmussen | |
| Movie | 1980 | Dan August: The Jealousy Factor | Chief | |
| Movie | 1964 | Seven Days in May | Col. Murdock | |
| Movie | 1973 | The Night Strangler | Dr. Richard Malcolm | |
| Movie | 1973 | Jarrett | Spencer Loomis | |
| Movie | 1952 | Scaramouche | Philippe de Valmorin (Marcus Brutus) | |
| Movie | 1951 | Across the Wide Missouri | Dick | |
| Movie | 1978 | Never Give Up | US green beret officer | |
| Movie | 1958 | The Long, Hot Summer | Alan Stewart | |
| Movie | 1956 | A Cry in the Night | Owen Clark | |
| Movie | 1959 | Compulsion | Max Steiner | |
| Movie | 1951 | The People Against O'Hara | Jeff Chapman | |
| Movie | 1951 | Cause for Alarm! | Lonesome Sailor | |
| Movie | 1964 | Kitten with a Whip | Grant | |
| Movie | 2010 | The Frankenstein Syndrome | Marquez | |
| Movie | 1982 | Knight Rider: Knight of the Phoenix | Ralph Wesley | |
| Movie | 1954 | The Student Prince | Lucas | |
| Movie | 1951 | The Unknown Man | Bob Masen | |
| Movie | 1994 | Bionic Ever After? | Oscar Goldman | |
| Movie | 1994 | The Glass Shield | Watch Cmmdr. Clarence Massey | |
| Movie | 1951 | No Questions Asked | Detective Walter O'Bannion | |
| Movie | 1951 | Storm Warning | Interne (uncredited) | |
| Movie | 1963 | Johnny Cool | Correspondent | |
| Movie | 1953 | Escape from Fort Bravo | Lieutenant Beecher | |
| Movie | 1951 | Payment on Demand | Jim Boland | |
| Movie | 1984 | Cover Up | Henry Towler | |
| Movie | 2003 | Hell's Highway: The True Story of Highway Safety Films | Husband (archive footage) | |
| Movie | 1951 | Go for Broke! | Lieutenant | |
| Movie | 1959 | The Gunfight at Dodge City | Dave Rudabaugh | |
| Movie | 1989 | Bionic Showdown: The Six Million Dollar Man and the Bionic Woman | Oscar Goldman | |
| Movie | 1974 | Black Eye | Dole | |
| Movie | 1958 | Curse of the Faceless Man | Dr. Paul Mallon | |
| Movie | 1972 | The Honkers | Royce Owens | |
| Movie | 1963 | A Gathering of Eagles | Col. Ralph Josten | |
| Movie | 1956 | The Search for Bridey Murphy | Dr. Deering | |
| Movie | 1951 | Rich, Young and Pretty | Bob Lennart | |
| Movie | 1955 | Hit the Deck | Lt. Jackson | |
| Movie | 1953 | Give a Girl a Break | Burton Bradshaw | |
| Movie | 1953 | The Story of Three Loves | Marcel | |
| Movie | 1973 | The Six Million Dollar Man: The Solid Gold Kidnapping | Oscar Goldman | |
| Movie | 1972 | The Astronaut | Dr. Wylie | |
| Movie | 1973 | The Six Million Dollar Man: Wine, Women and War | Oscar Goldman | |
| Movie | 1971 | Doctors' Wives | D.A. Douglas | |
| Movie | 1955 | It's a Dog's Life | George Oakley | |
| Movie | 1952 | Holiday for Sinners | Father Victor Carducci | |
| Movie | 1970 | Along Came a Spider | District Attorney Freiberg | |
| Movie | 1952 | Fearless Fagan | Capt. Daniels | |
| Movie | 1956 | Three Brave Men | Lt. Bill Horton | |
| Movie | 1979 | Murder by Natural Causes | George Brubaker | |
| Movie | 1953 | I Love Melvin | Harry Flack | |
| Movie | 2010 | Rock Hudson: Dark and Handsome Stranger | Himself | |
| Movie | 1967 | Ghostbreakers | Timothy Selfridge | |
| Movie | 1987 | Hoover vs. the Kennedys: The Second Civil War | Lyndon Johnson | |
| Movie | 1951 | Grounds for Marriage | Tommy | |
| Movie | 1952 | Just This Once | Tom Winters | |
| Movie | 1967 | The Ride to Hangman's Tree | Carlson | |
| Movie | 1953 | Dream Wife | Henry Malvine | |
| Movie | 1987 | The Stepford Children | Lawrence Danton | |
| Movie | 1954 | Betrayed | John (uncredited) | |
| Movie | 2021 | Hollywood in the Atomic Age: Monsters! Martians! Mad Scientists! | Self | |
| Movie | 1960 | The Wackiest Ship in the Army | Dennis Foster | |
| Movie | 1953 | The Case Against the 20% Federal Admissions Tax on Motion Picture Theatres | narrator | |
| Movie | 1978 | The Immigrants | Thomas Seldon | |
| Movie | 1970 | Menace on the Mountain | Maj. Galt | |
| Movie | 1985 | Perry Mason Returns | Ken Braddock | |
| Movie | 1988 | Stranger on My Land | Maj. Walters | |
| Movie | 1950 | The Vanishing Westerner | Deputy Sheriff Jeff Jackson | |
| Movie | 1972 | The Longest Night | Harvey Eaton | |
| Movie | 2018 | Rottentail | Thomas | |
| Movie | 1972 | Play It as It Lays | Les Goodwin | |
| Movie | 1957 | The Buster Keaton Story | Tom McAffee | |
| Movie | 1971 | Dead Men Tell No Tales | Tom Austin | |
| Movie | 1980 | Dan August: Once Is Never Enough | Chief George Untermeyer | |
| Movie | 1950 | The Magnificent Yankee | Reynolds | |
| Movie | 1987 | The Return of the Six-Million-Dollar Man and the Bionic Woman | Oscar Goldman | |
| Movie | 1972 | Say Goodbye, Maggie Cole | Dr. Ben Cole | |
| Movie | 1993 | Gettysburg | Maj. Gen. George G. Meade | |
| Movie | 1971 | Macho Callahan | Officer | |
| Movie | 1967 | The Hardy Boys: The Mystery of the Chinese Junk | Fenton Hardy | |
| Movie | 2006 | Amazing! Exploring the Far Reaches of Forbidden Planet | Self | |
| Movie | 1973 | Partners in Crime | Roger Goldsmith | |
| Movie | 1975 | The Bionic Woman | Oscar Goldman | |
| Movie | 1954 | Great Lady Has an Interview | Reporter (uncredited) | |
| TV Show | 1984 | Murder, She Wrote | Lew Bracken | 2 |
| TV Show | 1964 | The Man from U.N.C.L.E. | Senator Steve Bryant | 2 |
| TV Show | 1993 | Kung Fu: The Legend Continues | Narrator / Captain Bartlett Stiles | 2 |
| TV Show | 1983 | The A-Team | Dr. A.M. Richter | 1 |
| TV Show | 1963 | Kraft Suspense Theatre | General John Doe | 1 |
| TV Show | 1965 | The F.B.I. | Christian Palmer | 1 |
| TV Show | 1977 | The Love Boat | Art Akers | 1 |
| TV Show | 1976 | The Bionic Woman | Oscar Goldman | 58 |
| TV Show | 1981 | Simon & Simon | | 3 |
| TV Show | 1968 | Hawaii Five-O | Eugene Goodman | 1 |
| TV Show | 1960 | Checkmate | | 1 |
| TV Show | 1972 | The Streets of San Francisco | | 1 |
| TV Show | 1971 | Alias Smith and Jones | | 1 |
| TV Show | 1981 | Dynasty | Buck Fallmont | 9 |
| TV Show | 1968 | Land of the Giants | Joe Simmons | 1 |
| TV Show | 1985 | The New Alfred Hitchcock Presents | Tom Northcliff | 1 |
| TV Show | 1976 | Charlie's Angels | Sam Knight | 1 |
| TV Show | 1967 | Mannix | | 1 |
| TV Show | 1971 | Longstreet | | 1 |
| TV Show | 1968 | The Mod Squad | | 1 |
| TV Show | 1972 | Delphi Bureau | | 1 |
| TV Show | 1955 | Gunsmoke | Gregorio | 2 |
| TV Show | 1957 | Perry Mason | Edward Lewis | 1 |
| TV Show | 1963 | The Fugitive | Chief Barney Vilattic | 1 |
| TV Show | 1962 | Combat! | Sgt. Perkins | 1 |
| TV Show | 1963 | The Fugitive | George Forster | 1 |
| TV Show | 1971 | Cannon | | 2 |
| TV Show | 1957 | Zorro | | 2 |
| TV Show | 1981 | Darkroom | | 1 |
| TV Show | 1984 | Cover Up | Henry Towler | 22 |
| TV Show | 1997 | Extreme Ghostbusters | | 1 |
| TV Show | 1967 | Ironside | | 1 |
| TV Show | 1981 | The Fall Guy | | 1 |
| TV Show | 1960 | Hong Kong | | 1 |
| TV Show | 1961 | Target: The Corruptors! | | 2 |
| TV Show | 1961 | Bus Stop | | 26 |
| TV Show | 1962 | The Eleventh Hour | | 1 |
| TV Show | 1966 | Felony Squad | | 4 |
| TV Show | 1965 | The Wild Wild West | James Jeffers | 1 |
| TV Show | 1972 | Jigsaw | | 1 |
| TV Show | 1965 | Run for Your Life | Captain Swain | 1 |
| TV Show | 1967 | Cimarron Strip | | 1 |
| TV Show | 1964 | Daniel Boone | Sergeant Rafferty | 1 |
| TV Show | 1963 | The Fugitive | Colonel Lawrence | 1 |
| TV Show | 1964 | Karen | | 1 |
| TV Show | 1955 | The Millionaire | Rod Matthews | 1 |
| TV Show | 1962 | The Virginian | Harry Clark | 1 |
| TV Show | 1983 | Whiz Kids | | 1 |
| TV Show | 1982 | Bring 'Em Back Alive | | 1 |
| TV Show | 1960 | Thriller | Oliver Judson | 1 |
| TV Show | 1951 | Schlitz Playhouse of Stars | Hayden | 1 |
| TV Show | 1982 | Matt Houston | | 2 |
| TV Show | 1963 | The Fugitive | Lt. Sloan | 1 |
| TV Show | 1965 | The Big Valley | Travers | 1 |
| TV Show | 1964 | Slattery's People | | 1 |
| TV Show | 1983 | Automan | | 1 |
| TV Show | 1967 | Judd for the Defense | | 2 |
| TV Show | 1955 | Matinee Theater | | 1 |
| TV Show | 1969 | Bracken's World | | 1 |
| TV Show | 1973 | The New Perry Mason | | 1 |
| TV Show | 1958 | The Rifleman | | 4 |
| TV Show | 1958 | Wanted: Dead or Alive | Tom | 1 |
| TV Show | 1964 | 12 O'Clock High | | 2 |
| TV Show | 1959 | Law of the Plainsman | Lee Talent | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Sheriff John Bates | 1 |
| TV Show | 1963 | The Fugitive | Leonard Taft | 2 |
| TV Show | 1961 | Dr. Kildare | Dr. Norman Phelps | 1 |
| TV Show | 1957 | The Court of Last Resort | | 1 |
| TV Show | 1954 | Captain Midnight | | 1 |
| TV Show | 1950 | Mama Rosa | | 12 |
| TV Show | 1969 | My Friend Tony | | 3 |
| TV Show | 1966 | The Green Hornet | Phil Trager | 1 |
| TV Show | 1974 | The Six Million Dollar Man | Oscar Goldman | 99 |
| TV Show | 1964 | 12 O'Clock High | Brig. Gen. Phil Doud | 2 |
| TV Show | 1965 | The F.B.I. | Alex Ramsey | 1 |
| TV Show | 1965 | The F.B.I. | Charles Fillmore | 1 |
| TV Show | 1965 | The F.B.I. | Dr. Latimer | 1 |
| TV Show | 1965 | The F.B.I. | Clifford Banning | 1 |
| TV Show | 1965 | The F.B.I. | Dan Wheaton | 1 |
| TV Show | 1965 | The F.B.I. | Higgins | 1 |
| TV Show | 1965 | The Big Valley | Nathan Springer | 1 |
| TV Show | 1965 | The Big Valley | Warden Garreck | 1 |
| TV Show | 1965 | The Big Valley | Mel Trevor | 1 |
| TV Show | 1965 | The Big Valley | Hen Matson | 1 |
| TV Show | 1957 | Perry Mason | Lt. Steve Drumm | 30 |
| TV Show | 1955 | Gunsmoke | Maj. Aaron Coltraine | 2 |
| TV Show | 1980 | Condominium | Henry Churchbridge | 2 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | David Manning | 1 |
| TV Show | 1971 | Columbo | Bryce Chadwick | 1 |
| TV Show | 1979 | The French Atlantic Affair | Terrence Crown | 3 |
| TV Show | 1958 | Wanted: Dead or Alive | Jim Kramer | 1 |
| TV Show | 1982 | Knight Rider | Dr. Ralph Wesley | 1 |
| TV Show | 1985 | Kane & Abel | Alan Lloyd | 3 |
| TV Show | 1990 | Lucky Chances | Mr. Duke | 3 |
| TV Show | 1957 | Perry Mason | Jason Foster | 1 |
| TV Show | 1963 | The Lieutenant | Col. Clinton Hiland | 1 |
| TV Show | 1967 | Ironside | Dean Glenville | 1 |
| TV Show | 1970 | Dan August | Chief George Untermeyer | 26 |
| TV Show | 1959 | Bonanza | Jamison Fillmore | 1 |
| TV Show | 1967 | Ironside | Rod Ballard | 1 |
| TV Show | 1958 | The Rifleman | Jason Gowdy | 1 |
| TV Show | 1958 | The Rifleman | Griff | 1 |
| TV Show | 1963 | The Lieutenant | Lt. Col. Clinton Hiland | 1 |
| TV Show | 1967 | Ironside | Walter Conway | 1 |
| TV Show | 1966 | Mission: Impossible | Judge Wilson Chase | 1 |
| TV Show | 1967 | The Invaders | Blake | 1 |
| TV Show | 1971 | Owen Marshall: Counselor at Law | Fred Palmer | 1 |
| TV Show | 1959 | The Untouchables | Sidney Rogers / Zoran Bresnovitch | 1 |
| TV Show | 1966 | T.H.E. Cat | Percy Hagan | 1 |
| TV Show | 1978 | Pearl | Cmdr. Michael North | 3 |
| TV Show | 1973 | Barnaby Jones | Frank Cassidy | 1 |
| TV Show | 1962 | The Alfred Hitchcock Hour | Eddie Turtin | 1 |
| TV Show | 1969 | The Bold Ones: The New Doctors | Dr. Lensky | 1 |
| TV Show | 1967 | Ironside | Darren Sanford | 1 |
| TV Show | 1983 | Hardcastle and McCormick | J.J. Norcross | 1 |
| TV Show | 1963 | Miss USA | Judge | 1 |
| TV Show | 1981 | Nero Wolfe | Chester Winslow | 1 |
| TV Show | 1982 | Matt Houston | Wayne Slocum | 1 |
| TV Show | 1963 | Redigo | Tom Walker | 1 |
| TV Show | 1957 | Zorro | Ricardo del Amo | 2 |
| TV Show | 1954 | The Wonderful World of Disney | Major Galt | 2 |
