| Ano | Nota | Título | Personagem |
|---|---|---|---|
| 2004 | Los Angeles por Ela Mesma | Roy Morgan/Roy Martin in He Walked By Night (archive footage) | |
| 2002 | The Men Who Made the Movies: Samuel Fuller | Cpl. Denno (archive footage) (uncredited) | |
| 1982 | Bix: Ain't None of Them Play Like Him Yet | Self | |
| 1982 | Knight Rider: Knight of the Phoenix | Wilton Knight | |
| 1982 | Egypt: Quest for Eternity | Narrator (Self) | |
| 1980 | Marilyn: The Untold Story | Johnny Hyde | |
| 1979 | Muito Além do Jardim | Vladimir Skrapinov | |
| 1979 | Land of Celtic Ghosts | Himself | |
| 1979 | The Rebels | Duke of Kentland | |
| 1979 | Planet Mars | Narrator | |
| 1978 | The Great Bank Hoax | Manny Benchly | |
| 1978 | A Connecticut Yankee in King Arthur's Court | King Arthur | |
| 1977 | A Ilha do Dr Moreau | Sayer of the Law | |
| 1977 | Inundação | John Cutler | |
| 1977 | Stonestreet: Who Killed the Centerfold Model? | Elliott Osborn | |
| 1976 | Pânico em Munique | Willy Brandt | |
| 1976 | Mansion of the Doomed | Dr. Leonard Chaney | |
| 1976 | Degraus Para o Passado | Dr. Joshua Henderson (1871) | |
| 1975 | Valley Forge | - | |
| 1975 | Judgment: The Court Martial of Lt. William Calley | George Latimer | |
| 1974 | The First Woman President | Woodrow Wilson | |
| 1973 | Maneater | Carl Brenner | |
| 1973 | The Birdmen | Schiller | |
| 1973 | ...And Millions Die! | Dr Douglas Pruitt | |
| 1972 | Rage | Dr. Roy Caldwell | |
| 1972 | The Bounty Man | Angus Keough | |
| 1972 | Renegado Impiedoso | Nye Buell | |
| 1972 | Assignment: Munich | Maj. Barney Caldwell | |
| 1971 | The Death of Me Yet | Robert Barnes | |
| 1971 | City Beneath the Sea | The President | |
| 1971 | They've Killed President Lincoln! | Host / Narrator | |
| 1970 | The Andersonville Trial | Henry Wirz | |
| 1970 | O Único Sobrevivente | Brig. Gen. Russell Hamner | |
| 1969 | Hans Brinker | Dr. Boeker | |
| 1969 | O Homem que Eu Amo | Acteur | |
| 1968 | Ascensão e Queda do Terceiro Reich | Narrator | |
| 1967 | Jacqueline Susann and the Valley of the Dolls | - | |
| 1965 | The Satan Bug | Dr. Gregor Hoffman | |
| 1965 | Let My People Go: The Story of Israel | Narrator (voice) | |
| 1964 | Trial at Nuremberg | Narrator | |
| 1964 | Four Days In November | Narrator (voice) | |
| 1963 | Kings of the Sun | Ah Min | |
| 1963 | The Yanks Are Coming | Narrator (voice) | |
| 1962 | Cinzas Sem Glória | Adolf Hitler | |
| 1961 | Armas Selvagens | Steve Fallon | |
| 1960 | Visa to Canton | Don Benton | |
| 1960 | For the Love of Mike | Father Phelan | |
| 1960 | Retrato em Negro | Howard Mason | |
| 1960 | The Hiding Place | Martin Lambert | |
| 1960 | Cinco Mulheres Marcadas | Eric Reinhardt | |
| 1959 | L'ambitieuse | George Rancourt | |
| 1959 | Jons und Erdme | Wittkuhn | |
| 1958 | Amore e guai... | Paolo Martelli | |
| 1958 | Os Irmãos Karamazov | Ivan Karamazov | |
| 1957 | Para Que os Outros Possam Viver | Maj. Harry Cargill | |
| 1957 | Los jueves, milagro | Martino | |
| 1957 | So Soon to Die | Lionel Amblin | |
| 1956 | Moby Dick | Ishmael | |
| 1956 | Um Homem em Desespero | Reginald 'Reggie' Wilson | |
| 1956 | The Extra Day | Joe Blake | |
| 1955 | A Trapaça | Carlo | |
| 1955 | La vena d'oro | Ing. Stefano Manfredi | |
| 1955 | Le avventura di Cartouche | Il conte Jacques de Maudy | |
| 1955 | Canyon Crossroads | Larry Kendall | |
| 1954 | A Estrada da Vida | Il 'Matto' | |
| 1954 | Avanzi di galera | Doctor Stefano Luprandi | |
| 1954 | Os Bons Morrem Cedo | Joe Halsey | |
| 1954 | La mano dello straniero | Joe Hamstringer | |
| 1953 | Titanic | George S. Headley | |
| 1951 | Decisão Antes do Amanhecer | Lt. Dick Rennick | |
| 1951 | Baionetas Caladas | Cpl. Denno | |
| 1951 | Terrível Suspeita | Alan Spender | |
| 1951 | Horas Intermináveis | Robert Cosick | |
| 1950 | Homem Marcado | Larry Nelson | |
| 1949 | Tensão | Warren Quimby | |
| 1949 | A Sombra da Guilhotina | Maximilian Robespierre | |
| 1949 | Roseanna McCoy | Mounts Hatfield | |
| 1949 | O Demônio da Noite | Roy Martin / Roy Morgan | |
| 1947 | Mansão da Loucura | James Caldwell Demarest | |
| 1947 | Repeat Performance | William Williams |