Filmography86 titles
| Year | Title | Character | Age at release |
|---|---|---|---|
| 2021 | Hollywood in the Atomic Age: Monsters! Martians! Mad Scientists!Movie | Self | 88 |
| 2019 | Fly Trap: Catching a ClassicMovie | Self | 86 |
| 2011 | The Scarlet WormMovie | Mr. Paul (as Montgomery Ford) | 78 |
| 2009 | The Brooklyn HeistMovie | Curtis | 76 |
| 2009 | HierarchyMovie | Father Mulligan | 76 |
| 2008 | Paura: Lucio Fulci Remembered - Volume 1Movie | Self | 75 |
| 2003 | Cold CaseSeries | Rowland Hughes (2008) | 70 |
| 1996 | Terminal RushMovie | Nate | 63 |
| 1995 | Kissinger and NixonMovie | Secretary of State William P. Rogers | 62 |
| 1995 | Expect No MercyMovie | Bromfield | 62 |
| 1993 | Kung Fu: The Legend ContinuesSeries | Commissioner Kincaid | 60 |
| 1992 | Forever KnightSeries | — | 59 |
| 1992 | X-MenSeries | Bolivar Trask (voice) | 59 |
| 1992 | To Catch a KillerMovie | Stan Wilder | 59 |
| 1992 | Beyond JusticeMovie | Sal Cuomo | 59 |
| 1991 | The Law of the DesertSeries | Sal Cuomo | 58 |
| 1990 | The Godfather Part IIIMovie | Douglas Michelson | 57 |
| 1990 | CounterstrikeSeries | Senator | 57 |
| 1989 | The Black CatMovie | Leonard Levin | 56 |
| 1988 | The CommanderMovie | McPherson | 55 |
| 1988 | Cop GameMovie | Gen. Morris | 55 |
| 1984 | AirwolfSeries | Jason Darius | 51 |
| 1983 | AutomanSeries | — | 50 |
| 1982 | Cagney & LaceySeries | — | 49 |
| 1982 | Knight RiderSeries | Clark Sellers | 49 |
| 1982 | Matt HoustonSeries | Brogan | 49 |
| 1981 | The Fall GuySeries | — | 48 |
| 1979 | Buck Rogers in the 25th CenturySeries | Cruise Ship Captain | 46 |
| 1979 | The Dukes of HazzardSeries | Dunlap | 46 |
| 1979 | Hart to HartSeries | — | 46 |
| 1978 | Fantasy IslandSeries | Charles Layton | 45 |
| 1978 | The Crash of Flight 401Movie | Standish | 45 |
| 1977 | The Love BoatSeries | Clark Tyler | 44 |
| 1976 | Charlie's AngelsSeries | Steve Briggs | 43 |
| 1976 | The Bionic WomanSeries | — | 43 |
| 1973 | TomaSeries | Mark Wheelright | 40 |
| 1972 | Where Does It Hurt?Movie | Dr. Paolo Quagliomo | 39 |
| 1971 | ColumboSeries | Ken Archer | 38 |
| 1971 | Alias Smith and JonesSeries | — | 38 |
| 1971 | Four Times That NightMovie | John Price | 38 |
| 1970 | Roy Colt and Winchester JackMovie | Roy Colt | 37 |
| 1969 | Twenty Thousand Dollars for SevenMovie | Fred Leinster | 36 |
| 1968 | The Movie OrgyMovie | Self (archive footage) | 35 |
| 1968 | Wrath of GodMovie | Mike Barnett | 35 |
| 1966 | Congress of LoveMovie | Baron Stefan Abonyi | 33 |
| 1965 | Spy in Your EyeMovie | Bert Morris | 32 |
| 1965 | Espionage in LisbonMovie | George Farrell | 32 |
| 1964 | The Magnificent CuckoldMovie | Maria Grazia's Partner in Nightclub (uncredited) | 31 |
| 1963 | Jack and JennyMovie | Jack | 30 |
| 1962 | The Seventh SwordMovie | Don Carlos de Bazan | 29 |
| 1961 | Follow the SunSeries | — | 28 |
| 1961 | Five Fingers : Thin IceMovie | Iban Ahmed | 28 |
| 1960 | The Girl in Lovers LaneMovie | Bix Dugan | 27 |
| 1960 | Desire in the DustMovie | Dr. Ned Thomas | 27 |
| 1960 | Four Fast GunsMovie | Johnny Naco | 27 |
| 1959 | Jet Over The AtlanticMovie | Dr. Vanderbird | 26 |
| 1959 | Adventures in ParadiseSeries | Paul Spencer | 26 |
| 1959 | The Last BlitzkriegMovie | Captain Levin | 26 |
| 1959 | The Best of EverythingMovie | Eddie Harris | 26 |
| 1959 | Blood and SteelMovie | Jim | 26 |
| 1959 | The Atomic SubmarineMovie | Carl Neilson Jr. | 26 |
| 1959 | The Silent KillMovie | John Bowman | 26 |
| 1959 | Speed CrazyMovie | Nick Barrow | 26 |
| 1958 | Sea HuntSeries | — | 25 |
| 1958 | Bat MastersonSeries | Kyle Henderson | 25 |
| 1958 | Lafayette EscadrilleMovie | Frank Baylies | 25 |
| 1958 | I Want to Live!Movie | Sailor at party (uncredited) | 25 |
| 1958 | High School HellcatsMovie | Mike Landers | 25 |
| 1958 | Submarine SeahawkMovie | Lt. (J. G.) David Shore | 25 |
| 1958 | Cry Baby KillerMovie | Manny Cole | 25 |
| 1957 | Perry MasonSeries | Robert Finchley | 24 |
| 1957 | Harbor CommandSeries | — | 24 |
| 1957 | Hot Rod RumbleMovie | Jim Lawrence | 24 |
| 1956 | West PointSeries | — | 23 |
| 1956 | The Adventures of Jim BowieSeries | — | 23 |
| 1956 | Tales of the 77th Bengal LancersSeries | — | 23 |
| 1955 | Highway PatrolSeries | — | 22 |
| 1955 | Matinee TheaterSeries | — | 22 |
| 1955 | GunsmokeSeries | Elser | 22 |
| 1955 | The 20th Century Fox HourSeries | Copter Pilot | 22 |
| 1955 | The MillionaireSeries | Tony Cassella | 22 |
| 1955 | Revenge of the CreatureMovie | Pete (uncredited) | 22 |
| 1954 | The Black Shield of FalworthMovie | Young Squire / Apprentice Knight (uncredited) | 21 |
| 1954 | Ma and Pa Kettle at HomeMovie | Elwin Kettle | 21 |
| 1953 | Walking My Baby Back HomeMovie | Soldier (uncredited) | 20 |
| 1953 | All I DesireMovie | Chuck | 20 |