| The Outsider | 1968 | Businessman | TV Show |
| Ironside | 1967 | Professor Henry Appleton / Dr. Evans | TV Show |
| Mannix | 1967 | Judge Y. Franklin Leigh | TV Show |
| Batman | 1966 | Captain Carlisle / Club President | TV Show |
| I Saw What You Did | 1965 | John Austin | Movie |
| Apache Rifles | 1964 | Col. Perry | Movie |
| Temple Houston | 1963 | Adam Ballard | TV Show |
| The Story of Dr. Lister | 1963 | Jordan Lambert (uncredited) | Short Film |
| McHale's Navy | 1962 | George Gregory | TV Show |
| The Virginian | 1962 | Connally / Paul Nelson | TV Show |
| Blue Hawaii | 1961 | Jack Kelman | Movie |
| 87th Precinct | 1961 | James Mencken | TV Show |
| Hazel | 1961 | Mr. Belomont / Mr. Johnson / John Lucius | TV Show |
| Surfside 6 | 1960 | Wilbur Law / Arnold Henderson | TV Show |
| The Tall Man | 1960 | Ben Webster | TV Show |
| Coronado 9 | 1960 | Roger Nash | TV Show |
| City of Fear | 1959 | Lt. Mark Richards | Movie |
| Bonanza | 1959 | Marshal Vern Ludlow / Prosecutor / Dave Sinclair / ... | TV Show |
| Hawaiian Eye | 1959 | Duane Abbott / Gerald Meade | TV Show |
| Laramie | 1959 | Arnold DeWalt | TV Show |
| Lock Up | 1959 | Mark Clayton | TV Show |
| Men Into Space | 1959 | | TV Show |
| Philip Marlowe | 1959 | Jeff Varden | TV Show |
| Riverboat | 1959 | Dunnigan | TV Show |
| The Twilight Zone | 1959 | Trooper Bill Padgett | TV Show |
| The Man and the Challenge | 1959 | Captain Morris / Sawyer | TV Show |
| This Man Dawson | 1959 | | TV Show |
| Border Patrol | 1959 | Chief | TV Show |
| 77 Sunset Strip | 1958 | Thayer / David Wiley | TV Show |
| Bat Masterson | 1958 | Jim | TV Show |
| Mackenzie's Raiders | 1958 | Sam Whitfield | TV Show |
| Mike Hammer | 1958 | Roland | TV Show |
| Rescue 8 | 1958 | Fred Pauson | TV Show |
| Sea Hunt | 1958 | Jack Clayton | TV Show |
| The Ann Sothern Show | 1958 | Charlie | TV Show |
| Special Agent 7 | 1958 | | TV Show |
| Decision at Sundown | 1957 | Dr. John Storrow | Movie |
| She Devil | 1957 | Barton Kendall | Movie |
| Ten Thousand Bedrooms | 1957 | Bob Dudley | Movie |
| Colt .45 | 1957 | Joe Holman | TV Show |
| How to Marry a Millionaire | 1957 | Tony Marsh | TV Show |
| M Squad | 1957 | Brad Morgan | TV Show |
| Maverick | 1957 | Maj. John Reidinger | TV Show |
| Perry Mason | 1957 | Harry Arnold / Burt Farwell / J.R. Bradbury / ... | TV Show |
| Tales of Wells Fargo | 1957 | Grant Reynolds / Dean Chase / Pete Jennings | TV Show |
| The Frank Sinatra Show | 1957 | Clay Welles | TV Show |
| The Silent Service | 1957 | Cmdr. John D. Crowley / Morton | TV Show |
| Wagon Train | 1957 | Jonathan Lott / Matt Kirby | TV Show |
| Code 3 | 1957 | Det. Sgt. Robert Peters | TV Show |
| The Californians | 1957 | Jim Marston / Clint | TV Show |
| The George Sanders Mystery Theater | 1957 | Francis Parnell | TV Show |
| Affair in Reno | 1957 | Tony Lamarr | Movie |
| Rock Around the Clock | 1956 | Mike Dodd | Movie |
| Broken Arrow | 1956 | Major Stone | TV Show |
| State Trooper | 1956 | Cliff Bateman | TV Show |
| The Gale Storm Show: Oh! Susanna | 1956 | Lucky Malloy | TV Show |
| Zane Grey Theater | 1956 | Ad Masters | TV Show |
| Emergency Hospital | 1956 | Dr. Herb Ellis | Movie |
| Cheyenne | 1955 | Prescott / Colonel Ted Wilson | TV Show |
| Crossroads | 1955 | Ramsey Carr | TV Show |
| Jane Wyman Presents The Fireside Theatre | 1955 | Rensch | TV Show |
| Navy Log | 1955 | Commander Welby / Lieutenant Commander Vance Crawford / Skipper | TV Show |
| Science Fiction Theatre | 1955 | Prof. Arthur Gress / Police Lt. Mike Redding | TV Show |
| Screen Directors Playhouse | 1955 | Dr. Wallace | TV Show |
| The Bob Cummings Show | 1955 | Bill Lear / Bill Leer | TV Show |
| The Millionaire | 1955 | Tom Williams | TV Show |
| No Man's Woman | 1955 | Harlow Grant | Movie |
| TV Reader's Digest | 1955 | B.J. Andrews / Magistrate Halleck | TV Show |
| Climax! | 1954 | | TV Show |
| Lassie | 1954 | Dr. Ed Bryce / Kirby Norman / Dan Auburn / ... | TV Show |
| Dragon's Gold | 1954 | Mack Rossiter | Movie |
| Mayor of the Town | 1954 | Steele | TV Show |
| Stories of the Century | 1954 | L.H. Musgrove | TV Show |
| Private Secretary | 1953 | Walter Light | TV Show |
| The Loretta Young Show | 1953 | Gene Vernon / Perry Blodgett | TV Show |
| The Stars Are Singing | 1953 | Dave Parish | Movie |
| America for Me | 1953 | Rodeo Cowboy | Short Film |
| The Big Trees | 1952 | Frenchy LeCroix | Movie |
| The Adventures of Ozzie and Harriet | 1952 | John Archer | TV Show |
| The Ford Television Theatre | 1952 | Martin Baxter | TV Show |
| Rodeo | 1952 | Slim Martin | Movie |
| Sea Tiger | 1952 | Ben McGrun | Movie |
| Sound Off | 1952 | Maj. Paul Whiteside | Movie |
| This Is the Life | 1952 | Fred Turner | TV Show |
| The Unexpected | 1952 | Author | TV Show |
| A Yank in Indo-China | 1952 | Mulvaney | Movie |
| Best of the Badmen | 1951 | Curley Ringo | Movie |
| Home Town Story | 1951 | Don (uncredited) | Movie |
| My Favorite Spy | 1951 | Henderson | Movie |
| Santa Fe | 1951 | Clint Canfield | Movie |
| Schlitz Playhouse | 1951 | Barney Wallace | TV Show |
| Hollywood Opening Night | 1951 | | TV Show |
| Destination Moon | 1950 | Jim Barnes | Movie |
| High Lonesome | 1950 | Pat Farrell | Movie |
| Armstrong Circle Theatre | 1950 | | TV Show |
| The Bigelow Theatre | 1950 | | TV Show |
| The Great Jewel Robber | 1950 | Police Detective Lou Sampter | Movie |
| Hollywood Theatre Time | 1950 | | TV Show |
| Colorado Territory | 1949 | Reno Blake | Movie |
| White Heat | 1949 | Philip Evans | Movie |
| Fireside Theatre | 1949 | | TV Show |
| Suspense | 1949 | | TV Show |
| Your Show Time | 1949 | | TV Show |
| The Silver Theatre | 1949 | | TV Show |
| Studio One in Hollywood | 1948 | Stephen | TV Show |
| The Lost Moment | 1947 | Charles | Movie |
| The Eve of St. Mark | 1944 | Pvt. Carter | Movie |
| Roger Touhy, Gangster | 1944 | FBI Agent Kerrigan | Movie |
| Crash Dive | 1943 | Curly Bowman (uncredited) | Movie |
| Guadalcanal Diary | 1943 | Lt. Thurmond | Movie |
| Hello Frisco, Hello | 1943 | Ned Clark | Movie |
| Sherlock Holmes in Washington | 1943 | Lt. Pete Merriam | Movie |
| Shantytown | 1943 | Bill Allen | Movie |
| The Purple V | 1943 | Jimmy Thorne | Movie |
| No Exceptions | 1943 | Letter Writing Soldier / Narrator | Short Film |
| Bowery at Midnight | 1942 | Richard Dennison | Movie |
| Hi, Neighbor | 1942 | Dr. Hall | Movie |
| Scattergood Survives a Murder | 1942 | Dunker Gilson | Movie |
| Mrs. Wiggs of the Cabbage Patch | 1942 | Dr. Robert Redmond (uncredited) | Movie |
| Police Bullets | 1942 | Prof. J. Thomas Quincy | Movie |
| Cheers for Miss Bishop | 1941 | Richard Clark (as Ralph Bowman) | Movie |
| City of Missing Girls | 1941 | James Horton | Movie |
| King of the Zombies | 1941 | Bill Summers | Movie |
| Paper Bullets | 1941 | Bob Elliott | Movie |
| Scattergood Baines | 1941 | Johnny Bones | Movie |
| The People vs. Dr. Kildare | 1941 | Interne (uncredited) | Movie |
| Mountain Moonlight | 1941 | Dr. Ed | Movie |
| Sucker List | 1941 | William Allen | Short Film |
| Always Tomorrow: The Portrait of an American Business | 1941 | Jim Westlake | Movie |
| Barnyard Follies | 1940 | Jeff Hill (as Ralph Bowman) | Movie |
| Curtain Call | 1940 | Ted Palmer | Movie |
| Career | 1939 | Ray Cruthers | Movie |
| Dick Tracy Returns | 1938 | Mr. Clark (uncredited) | Movie |
| Letter of Introduction | 1938 | Reporter (uncredited) | Movie |
| Overland Stage Raiders | 1938 | Bob Whitney (as Ralph Bowman) | Movie |
| Flaming Frontiers | 1938 | Tom Grant (as Ralph Bowman) | Movie |
| Spring Madness | 1938 | Dartmouth College Student (uncredited) | Movie |
