2004
Los Angeles Plays Itself as Roy Morgan/Roy Martin in He Walked By Night (archive footage)2002
The Men Who Made the Movies: Samuel Fuller as Cpl. Denno (archive footage) (uncredited)1982
Knight Rider as Wilton Knight1982
Knight Rider: Knight of the Phoenix as Wilton Knight1982
Egypt: Quest for Eternity as Narrator (Self)1982
Bix: Ain't None of Them Play Like Him Yet as Self1981
Mr. Merlin as Not available1981
Masada as Narrator1980
Marilyn: The Untold Story as Johnny Hyde1979
Tales of the Unexpected as Slade1979
The Rebels as Duke of Kentland1979
Being There as Vladimir Skrapinov1979
Planet Mars as Narrator1979
Land of Celtic Ghosts as Himself1978
Vega$ as Not available1978
W.E.B. as Not available1978
The Critical List as Matt Kinsella1978
The Great Bank Hoax as Manny Benchly1978
A Connecticut Yankee in King Arthur's Court as King Arthur1977
The Love Boat as Stan Ellis1977
How the West Was Won as Colonel Flint1977
The Island of Dr. Moreau as Sayer of the Law1977
Flood! as John Cutler1977
Stonestreet: Who Killed the Centerfold Model? as Elliott Osborn1976
Mansion of the Doomed as Dr. Leonard Chaney1976
21 Hours at Munich as Willy Brandt1976
Time Travelers as Dr. Joshua Henderson (1871)1975
Joe Forrester as Not available1975
Valley Forge as Not available1975
Medical Story as Not available1975
Judgment: The Court Martial of Lt. William Calley as George Latimer1974
Little House on the Prairie as Not available1973
The Birdmen as Schiller1973
...And Millions Die! as Dr Douglas Pruitt1973
Maneater as Carl Brenner1972
The Streets of San Francisco as Bishop Tim Farrow1972
Chato's Land as Nye Buell1972
The Bounty Man as Angus Keough1972
Assignment: Munich as Maj. Barney Caldwell1972
Rage as Dr. Roy Caldwell1971
Columbo as Nicholas Framer1971
City Beneath the Sea as The President1971
The Death of Me Yet as Robert Barnes1971
They've Killed President Lincoln! as Host / Narrator1970
Dan August as Prof. Theodore Rye1970
The Andersonville Trial as Henry Wirz1970
Sole Survivor as Brig. Gen. Russell Hamner1969
Marcus Welby, M.D. as Professor Andrew Kirkcastle1969
Marcus Welby, M.D. as Reece Sutton1969
Love Is a Funny Thing as Acteur1969
Hans Brinker as Dr. Boeker1968
Hawaii Five-O as Murdock1968
The Rise and Fall of the Third Reich as Narrator1967
Ironside as Noel Seymour1965
The Satan Bug as Dr. Gregor Hoffman1965
National Geographic Specials as Narrator (voice)1965
Let My People Go: The Story of Israel as Narrator (voice)1964
Voyage to the Bottom of the Sea as Adm. Harriman Nelson1964
Four Days In November as Narrator (voice)1964
Trial at Nuremberg as Narrator1963
Arrest and Trial as Not available1963
Kings of the Sun as Ah Min1963
The Yanks Are Coming as Narrator (voice)1962
Combat! as Capt. Steiner1962
The Alfred Hitchcock Hour as Philip Townsend1962
The Alfred Hitchcock Hour as Miles Crawford1962
Hitler as Adolf Hitler1961
Ben Casey as Not available1961
The Savage Guns as Steve Fallon1960
Route 66 as Not available1960
Portrait in Black as Howard Mason1960
Five Branded Women as Eric Reinhardt1960
Visa to Canton as Don Benton1960
For the Love of Mike as Father Phelan1959
The Twilight Zone as Adam Cook1959
Rawhide as Tod Stone1959
The Ambitious One as George Rancourt1959
Jons und Erdme as Wittkuhn1958
Naked City as Lester Bergson1958
The Brothers Karamazov as Ivan Karamazov1958
Love and Troubles as Paolo Martelli1957
Time Limit as Maj. Harry Cargill1957
Miracles of Thursday as Martino1956
Dick Powell's Zane Grey Theatre as David Manning1956
Moby Dick as Ishmael1956
The Extra Day as Joe Blake1956
Finger of Guilt as Reginald 'Reggie' Wilson1955
Gunsmoke as Captain Aron Sligo1955
Canyon Crossroads as Larry Kendall1955
The Swindle as Picasso1955
Cartouche as Il conte Jacques de Maudy1955
The Golden Vein as Ing. Stefano Manfredi1954
La Strada as Il 'Matto'1954
The Good Die Young as Joe Halsey1954
The Stranger's Hand as Joe Hamstringer1954
Jailbirds as Doctor Stefano Luprandi1953
Titanic as George S. Headley1951
Hallmark Hall of Fame as Conway1951
Hallmark Hall of Fame as General Washington1951
The House on Telegraph Hill as Alan Spender1951
Fourteen Hours as Robert Cosick1951
Fixed Bayonets! as Cpl. Denno1951
Decision Before Dawn as Lt. Dick Rennick1950
Outside the Wall as Larry Nelson1949
He Walked by Night as Roy Martin / Roy Morgan1949
Reign of Terror as Maximilian Robespierre1949
Tension as Warren Quimby1949
Roseanna McCoy as Mounts Hatfield1948
Studio One as Matt Donovan1947
Cry Wolf as James Caldwell Demarest1947
Repeat Performance as William Williams