Acting

2015

as Alfred Davidson (archive footage)

1997

as Self (archive footage)

1993

as Self (archive footage)

1991		Preminger: Anatomy of a Filmmaker as Self
1991		The Perfect Tribute as Edward Everett

1990		Hired to Kill as Rallis
1990		Old Explorers as Warner Watney

1989

as Judge Leatham

1987		Young Harry Houdini as Dr. Tybalt Grimaldi
1987		The Sun and the Moon

1986		Blood & Orchids as Walter Bergman
1986		Raíces eternas as English Narrator

1985		Covenant as Victor Noble
1985		Jacques Cousteau: The First 75 Years as Narrator (voice)
1985		Seduced as James Killian
1985		Hitler's SS : Portrait In Evil as Prof. Ludwig Rosenberg

1984		Dune as Padisha Emperor Shaddam IV
1984		Samson and Delilah as The High Priest
1984		The Evil That Men Do as Dr. Hector Lomelin

1983		To Be or Not to Be as Prof. Siletski
1983		The Wind in the Willows as Badger (voice)
1983		The Being as Mayor Gordon Lane
1983		Blood Feud as Edward Bennett Williams
1983		The Horror of It All as Self / Narrator
1983		This Girl For Hire as Harrison Wooly

1982		Blood Tide as Nereus
1982		A Midsummer Night's Sex Comedy as Leopold
1982		And They're Off as Martin Craig
1982		Night of 100 Stars as Self

1981		Bloody Birthday as Doctor
1981		Berlin Tunnel 21 as Martin Komansky
1981		Evita Peron as Agustin Magaldi

1980		Pleasure Palace as 'Pokey'
1980		The Big Brawl as Dominici
1980		Gideon's Trumpet as Abe Fortas
1980		The Murder That Wouldn't Die as Jeff Briggs

1979		Natural Enemies as Harry Rosenthal
1979		The Fifth Musketeer as Athos
1979		UFOs: It Has Begun
1979		Life of Sin

1978		The Swarm as Dr. Andrews
1978		Fedora as Doctor Vando
1978		The Amazing Captain Nemo as Captain Nemo
1978		Fame as Francesco

1977		Simple Gifts as Narrator (segment "A Memory of Christmas") (voice)
1977		The Private Files of J. Edgar Hoover as Lionel McCoy
1977		Exo-Man as Kermit Haas
1977		Dracula's Dog as Inspector Branco
1977		Who Has Seen the Wind as The Ben
1977		The Sentinel as Priest of the Brotherhood

1976		Crash! as Marc Denne
1976		Voyage of the Damned as Manuel Benitez
1976		The Big Bus as Ironman
1976		Paco as Fermin Flores

1975		The Art of Crime as Beckwith Sloan
1975		Rickles
1975		Medical Story as Dr. William Knowland
1975		Order to Kill as Inspector Reed
1975		Forever Young, Forever Free as Father Alberto
1975		The Missing Are Deadly

1974

as Cyrano de Bergerac (voice)

1973

as Jake Weinhaus

1971		Crosscurrent as Dr. Charles Bedford
1971		Gideon as Angel of the Lord
1971		Banyon as Lee Jennings

1970

as Dr. Alfred Vreeland

1968

as Ben Haramed (voice)

1967		Cervantes as Hassan Bey
1967		Kismet as Hajj
1967		Enter Laughing as Harrison B. Marlowe

1965		Ship of Fools as Rieber
1965		The Greatest Story Ever Told as Herod Antipas

1964

as Cyrano de Bergerac

1963		Stop Train 349 as Cowan the Reporter
1963		Nine Hours to Rama as Superintendent Das

1962

as Turkish Bey

1958		The High Cost of Loving as Jim Fry
1958		I Accuse! as Captain Alfred Dreyfus

1957

as Director

1956

as Joe Harris

1955		The Cockleshell Heroes as Major Stringer
1955		The Shrike as Jim Downs

1954		Deep in My Heart as Sigmund Romberg
1954		The Caine Mutiny as Lt. Barney Greenwald

1953

as Alfred Davidson

1952		Moulin Rouge as Henri de Toulouse-Lautrec
1952		Anything Can Happen as Giorgi Papashvily

1950		Cyrano de Bergerac as Cyrano de Bergerac
1950		Crisis as Raoul Farrago
1950		The Secret Fury as José (uncredited)
1950		Whirlpool as David Korvo

1948

as The Dauphin, Charles VII, later King of France

Directing

1962

… Director

1961

… Director

1958		The High Cost of Loving … Director
1958		I Accuse! … Director

1956

… Director

1955		The Cockleshell Heroes … Director
1955		The Shrike … Director

Writing

1956

… Screenplay