| Movie | 1971 | Hannie Caulder | Thomas Luther Price | |
| Movie | 2005 | Santa's Slay | Grandpa | |
| Movie | 1969 | Bob & Carol & Ted & Alice | Bob Sanders | |
| Movie | 2005 | Steve McQueen: The Essence of Cool | Self | |
| Movie | 1997 | Most Wanted | Donald Bickhart | |
| Movie | 1963 | PT 109 | Ensign George 'Barney' Ross | |
| Movie | 1985 | Turk 182! | Mayor Tyler | |
| Movie | 1976 | Sky Riders | Jonas Bracken | |
| Movie | 1989 | Silent Night, Deadly Night 3: Better Watch Out! | Lt. Connely | |
| Movie | 2000 | Innocents | Judge Winston | |
| Movie | 1963 | Sunday in New York | Russ Wilson | |
| Movie | 1997 | Big Guns Talk: The Story of the Western | Self | |
| Movie | 1976 | The Great Scout & Cathouse Thursday | Jack Colby | |
| Movie | 1976 | Breaking Point | Frank Sirrianni | |
| Movie | 2004 | Los Angeles Plays Itself | Frank Boggs in Hickey & Boggs (archive footage) | |
| Movie | 1995 | Xtro 3: Watch the Skies | Major Guardino | |
| Movie | 1973 | A Name for Evil | John Blake | |
| Movie | 1972 | Hickey & Boggs | Frank Boggs | |
| Movie | 2001 | Hunger | The Chief | |
| Movie | 1975 | Inside Out | Sly Wells | |
| Movie | 1987 | Big Bad Mama II | Daryl Pearson | |
| Movie | 1964 | The Hanged Man | Harry Pace | |
| Movie | 1973 | A Cold Night's Death | Robert Jones | |
| Movie | 1979 | Goldengirl | Steve Esselton | |
| Movie | 1999 | Hollywood Screen Tests: Take 1 | Narrator | |
| Movie | 1973 | Outrage | Jim Kiler | |
| Movie | 2011 | Sheldon Leonard's Wonderful Life | Self | |
| Movie | 2001 | Cleopatra: The Film That Changed Hollywood | Narrator | |
| Movie | 1985 | The Key to Rebecca | Gen. Erwin Rommel | |
| Movie | 1977 | Flood! | Steve Brannigan | |
| Movie | 1994 | I Spy Returns | Kelly Robinson | |
| Movie | 1996 | Mercenary | McClean | |
| Movie | 1969 | Operation Breadbasket | Self - Narrator | |
| Movie | 1963 | The Raiders | Wild Bill Hickock | |
| Movie | 1991 | Murderous Vision | Dr. Bordinay | |
| Movie | 1974 | Houston, We've Got a Problem | Steve Bell | |
| Movie | 1990 | Perry Mason: The Case of the Defiant Daughter | Richard Stuart | |
| Movie | 1999 | Canned Ham: The Dr. Evil Story | Self | |
| Movie | 1979 | Hot Rod | T.L. Munn | |
| Movie | 2004 | The Almost Guys | The Colonel | |
| Movie | 1975 | A Cry for Help | Harry Freeman | |
| Movie | 2002 | NBC 75th Anniversary Special | Self | |
| Movie | 1981 | Killjoy | Lou Corbin | |
| Movie | 1982 | National Lampoon's Movie Madness | Paul Everest ("Success Wanters") | |
| Movie | 1999 | Wanted | Fr. Patrick | |
| Movie | 1977 | Spectre | William Sebastian | |
| Movie | 1986 | The Gladiator | Lieutenant Frank Mason | |
| Movie | 1990 | That's Action | Narrator | |
| Movie | 1995 | Panther | Charles Garry | |
| Movie | 1974 | The Castaway Cowboy | Calvin Bryson | |
| Movie | 1986 | Combat Academy | General Edward 'Ed' Woods | |
| Movie | 1996 | Sex, Censorship and the Silver Screen | Quote Reader | |
| Movie | 2010 | The Assignment | Blakesley | |
| Movie | 1973 | See the Man Run | Ben Taylor | |
| Movie | 1988 | What Price Victory | Billy Bob Claiborne | |
| Movie | 1964 | Rhino! | Dr. Hanlon | |
| Movie | 2003 | Blind Eye | Isaac | |
| Movie | 1991 | Timebomb | Mr. Phillips | |
| Movie | 2000 | Running Mates | Sen. Parker Gable | |
| Movie | 1986 | The Blue Lightning | Lester McInally | |
| Movie | 1969 | Black and White: Uptight | Host | |
| Movie | 1993 | The Pelican Brief | The President | |
| Movie | 1962 | Sammy, the Way-Out Seal | Chester 'Chet' Loomis | |
| Movie | 1979 | A Cry For Justice | Sgt. Price | |
| Movie | 1984 | Calendar Girl Murders | Richard Trainor | |
| Movie | 1989 | Pucker Up and Bark Like a Dog | Gregor | |
| Movie | 1996 | Spy Hard | Businessman | |
| Movie | 1980 | The Night the City Screamed | Frank McGuire | |
| Movie | 1973 | The Lie | Lawrence | |
| Movie | 1979 | Playboy's Roller Disco & Pajama Party | Self (uncredited) | |
| Movie | 2000 | Farewell, My Love | Michael Reilly | |
| Movie | 1978 | Last of the Good Guys | Sgt. Nichols | |
| Movie | 1990 | Voyage of Terror: The Achille Lauro Affair | General Davies | |
| Movie | 1974 | Strange Homecoming | Jack Halsey | |
| Movie | 1985 | Brothers-in-Law | Winston Goodhue | |
| Movie | 1984 | Her Life as a Man | Dave Fleming | |
| Movie | 2000 | Newsbreak | Judge McNamara | |
| Movie | 1982 | Thou Shalt Not Kill | Steve Nevins | |
| Movie | 1993 | Warren Oates: Across the Border | Self | |
| Movie | 1995 | National Lampoon's Favorite Deadly Sins | Actor Playing Noble Hart | |
| TV Show | 1984 | Murder, She Wrote | Norman Amberson | 1 |
| TV Show | 1963 | The Great Adventure | Sam Houston | 1 |
| TV Show | 1983 | Hardcastle and McCormick | | 1 |
| TV Show | 1971 | Columbo | Bart Kepple | 1 |
| TV Show | 1957 | Trackdown | | 71 |
| TV Show | 1961 | Cain's Hundred | Kurt Yoder | 1 |
| TV Show | 2002 | The Dead Zone | Jeffrey Grissom | 1 |
| TV Show | 1985 | The Golden Girls | Simon | 1 |
| TV Show | 1986 | Matlock | | 2 |
| TV Show | 1994 | Gargoyles | Halcyon Renard (voice) | 4 |
| TV Show | 1981 | The Greatest American Hero | Bill Maxwell | 43 |
| TV Show | 1996 | Everybody Loves Raymond | Warren Whelan | 11 |
| TV Show | 1993 | The Nanny | Stewart Babcock | 1 |
| TV Show | 1990 | Wings | Ace Galvin | 1 |
| TV Show | 1993 | Walker, Texas Ranger | Lyle Pike | 1 |
| TV Show | 1958 | Naked City | Richard Calder | 1 |
| TV Show | 1955 | Gunsmoke | Joe | 1 |
| TV Show | 1948 | Studio One | Male Telescreen Voice | 1 |
| TV Show | 1962 | Combat! | Sgt. John Metcalf | 1 |
| TV Show | 1993 | Dr. Quinn, Medicine Woman | Elias Jackson | 1 |
| TV Show | 1953 | General Electric Theater | Captain Masters | 1 |
| TV Show | 1987 | Jake and the Fatman | | 1 |
| TV Show | 1965 | Get Smart | | 1 |
| TV Show | 1965 | I Spy | Kelly Robinson | 82 |
| TV Show | 1994 | Chicago Hope | Benjamin Quinn | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Clarence | 1 |
| TV Show | 1960 | Outlaws | | 1 |
| TV Show | 1961 | Target: The Corruptors! | | 1 |
| TV Show | 1959 | Rawhide | Craig Kern | 1 |
| TV Show | 1973 | Police Story | | 3 |
| TV Show | 1962 | The Virginian | Charles 'Charlie' Orwell | 1 |
| TV Show | 1968 | Rowan & Martin's Laugh-In | Self | 2 |
| TV Show | 1979 | Roots: The Next Generations | Lyle Pettijohn | 7 |
| TV Show | 1958 | The Rifleman | | 1 |
| TV Show | 1961 | Ben Casey | | 2 |
| TV Show | 1963 | Mr. Novak | Frank Menlow | 1 |
| TV Show | 1959 | The Detectives | | 1 |
| TV Show | 1950 | Robert Montgomery Presents | Sam Bullock | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Hoby Gilman | 1 |
| TV Show | 1955 | Playwrights '56 | | 1 |
| TV Show | 1960 | Tate | | 1 |
| TV Show | 1959 | Johnny Ringo | Clay Horne | 1 |
| TV Show | 1961 | Dr. Kildare | Matt Hendricks | 1 |
| TV Show | 1960 | The Westerner | Prescott | 1 |
| TV Show | 1963 | The Outer Limits | Paul Cameron | 1 |
| TV Show | 1959 | The DuPont Show with June Allyson | Stuart Douglas | 1 |
| TV Show | 1993 | Diagnosis: Murder | Dane Travis | 1 |
| TV Show | 1980 | The Dream Merchants | Henry Farnum | 3 |
| TV Show | 1975 | Saturday Night Live | Self - Host | 1 |
| TV Show | 1960 | The Barbara Stanwyck Show | Archie Bishop | 1 |
| TV Show | 1966 | Tales to Keep You Awake | Trent (archive footage) (uncredited) | 1 |
| TV Show | 1994 | Viper | Mark Bishop | 1 |
| TV Show | 1961 | Dr. Kildare | Dr. Jesse Hartwood | 1 |
| TV Show | 1961 | Cain's Hundred | Hank Shannon | 1 |
| TV Show | 1984 | The Cosby Show | Scott Kelly | 1 |
| TV Show | 1963 | The Outer Limits | Allen Leighton | 1 |
| TV Show | 1971 | Columbo | Investigator Brimmer | 1 |
| TV Show | 1963 | The Outer Limits | Trent | 1 |
| TV Show | 1963 | Bob Hope Presents the Chrysler Theatre | Peter Furgatch | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Deputy Sam Applegate | 1 |
| TV Show | 1956 | Dick Powell's Zane Grey Theatre | Shad Hudson | 1 |
| TV Show | 1948 | The Ed Sullivan Show | Self | 1 |
| TV Show | 1960 | The Chevy Mystery Show | Abel | 1 |
| TV Show | 1971 | V.I.P. Schaukel | Self | 1 |
| TV Show | 1959 | Bonanza | Ed Payson | 1 |
| TV Show | 1958 | The Rifleman | Dave Foley | 1 |
| TV Show | 1984 | Highway to Heaven | Ronald James | 1 |
| TV Show | 1997 | Conan the Adventurer | King Vog | 1 |
| TV Show | 1994 | Burke's Law | Hiram Waters | 1 |
| TV Show | 2005 | Robot Chicken | Bill Maxwell / Sheriff of Nottingham (voice) | 1 |
| TV Show | 1964 | The Man from U.N.C.L.E. | Captain Shark | 1 |
| TV Show | 1990 | Law & Order | Robert Culp (uncredited) | 1 |
| TV Show | 1971 | Columbo | Paul Hanlon | 1 |
| TV Show | 1977 | The Love Boat | Ross Latham | 1 |
| TV Show | 1971 | Columbo | Jordan Rowe | 1 |
| TV Show | 1993 | Lois & Clark: The New Adventures of Superman | Mr. Darryl | 2 |
| TV Show | 1979 | Women in White | Anthony Broadhurst | 3 |
| TV Show | 1968 | The Name of the Game | Paul Tyler | 2 |
| TV Show | 1962 | The Alfred Hitchcock Hour | Harry Lawrence | 1 |
| TV Show | 1952 | Death Valley Days | Thomas Burdue / James Stuart | 1 |
| TV Show | 1961 | 87th Precinct | Curt Donaldson | 1 |
| TV Show | 1950 | The Jack Benny Program | Self | 1 |
| TV Show | 1969 | Turn-On | | 1 |
| TV Show | 1982 | Hotel | Daniel Kingsford | 1 |
| TV Show | 1982 | Hotel | Paul Fitzgerald | 1 |
| TV Show | 1979 | Mrs. Columbo | Charles Huston | 1 |
| TV Show | 1987 | Jake and the Fatman | Harrison Gregg | 1 |
