2017Arthur Miller: Writer— Self (archive footage)
2016All Governments Lie: Truth, Deception, and the Spirit of I.F. Stone— Ben Bradlee (archive footage)
2006Metallica: The Videos 1989-2004— Joe's Father (video "One")
2006Eugene O’Neill: A Documentary Film— Self
2004Sam Peckinpah's West: Legacy of a Hollywood Renegade— Self (archive footage)
2000Once Upon a Time: Sergio Leone— Self (archive footage)
2000Going Home— Charles Barton
2000That Moment: Magnolia Diary— Self
1999Manolya— Earl Partridge
1999Mein liebster Feind— Self (archive footage)
1998The Real Macaw— Grandpa Girdis
1998Heartwood— Logan Reeser
1998Beloved— Mr. Bodwin
1997Aile Bağları— Larry Cook
1997Truman— Narrator (voice)
1996T.R.: The Story of Theodore Roosevelt— Narrator
1995The Great American West— Narrator (voice)
1995My Antonia— Josea Burden
1995Journey— Marcus
1995Denizde İsyan— Rear Admiral Anderson (uncredited)
1994İşkolik— Graham Keighley
1994The Enemy Within— General R. Pendleton Lloyd
1994Over Washington D.C.: Our Nation's Capital— Narrator
1994Little Big League— Thomas Heywood
1993Huck Finn'in Maceraları— The King
1993The Trial— Doctor Huld
1993Sam Peckinpah: Man of Iron— Self
1993Philadelphia— Charles Wheeler
1993La Classe américaine— The Newspaper Director (archive footage)
1993Heidi— Großvater
1992Storyville— Clifford Fowler
1992Deceptions— Clay (voice)
1992Lincoln— President Abraham Lincoln (voice)
1992The Peoples Palace: Secrets of the New York Public Library— Self - Narrator (voice)
1992When It Was a Game 2— Passage Narrator (voice)
1991Mark Twain and Me— Mark Twain
1991Empire of the Air: The Men Who Made Radio— Narrator (voice)
1991The Perfect Tribute— President Abraham Lincoln
1991Chernobyl: The Final Warning— Dr. Armand Hammer
1991Rabbit Ears - Jonah and the Whale— Narrator (voice)
1991When It Was a Game— (voice)
1990Hızlı Değişim— Chief Rotzinger
1990Night of 100 Stars III— Self
1989Çılgın Aile— Frank Buckman
1989Küçük Rüyalar— Coleman Ettinger
1989Black Rainbow— Walter Travis
1989Reunion— Henry Strauss
1989Thomas Hart Benton— Narrator (voice)
1988Bright Lights, Big City— Mr. Hardy (uncredited)
1988The Good Mother— W. O. Muth
1988The Christmas Wife— John Tanner
1988Inherit the Wind— Harry Drummond
1987Acı Hatıralar— Dillard
1987Tutku Cehennemi— Wade Shephard
1987Breaking Home Ties— Lloyd Wells
1987Happy 100th Birthday, Hollywood— Self
1986Werner Herzog: Filmemacher— Self (archive footage)
1986Johnny Bull— Stephan Kovacs
1985Empire City— Self - Narrator (voice)
1984You Can't Take it With You— Grandpa Martin Vanderhof
1984America and Lewis Hine— Voice
1984Sakharov— Andrei Sakharov
1984The World of Tomorrow— Self / Narrator
1983Max Dugan Returns— Max Dugan
1983The Day After— Dr. Russell Oakes
1983Something Wicked This Way Comes— Charles Halloway
1983The Time of Our Lives: The Most Amazing 60 Years in History— Self - Host
1982Burden of Dreams— Fitzcarraldo (archive footage)
1982Night of 100 Stars— Self
1981The Legend of the Lone Ranger— President Ulysses S. Grant
1980Caboblanco— Gunther Beckdorff
1980Raise the Titanic— Admiral James Sandecker
1980Melvin and Howard— Howard Hughes
1980F.D.R.: The Last Year— President Franklin D. Roosevelt
1980Haywire— Leland Hayward
1980Ghosts of Cape Horn— Narrator
1979Hurricane— Capt. Charles Bruckner
1978Comes a Horseman— Jacob 'J.W.' Ewing
1978A Christmas to Remember— Daniel Larson
1977Julia— Dashiell Hammett
1976Başkanın Bütün Adamları— Ben Bradlee
1976Addie and the King of Hearts— James "Jamie" Mills
1976Tod eines Fremden— Inspector Barkan
1975A Moon for the Misbegotten— James Tyrone Jr.
1975Mr. Sycamore— John Gwilt
1975The Easter Promise— James "Jamie" Mills
1974The Country Girl— Frank Elgin
1973Eski Dost— Governor Wallace
1973The Thanksgiving Treasure— James "Jamie" Mills
1973Old Faithful— Jason Robards
1972The House Without a Christmas Tree— James "Jamie" Mills
1972The War Between Men and Women— Stephen Kozlenko
1971Murders in the Rue Morgue— Cesar Charron
1971Johnny Askere Gitti— Joe's Father
1970Tora! Tora! Tora!— General Walter C. Short
1970Çöl Şeytanı— Cable Hogue
1970Julius Caesar— Marcus Brutus
1970Fools— Matthew South
1970Rosolino Paternò, soldato...— Sam Armstrong
1968Isadora— Paris Singer
1968The Night They Raided Minsky's— Raymond Paine
1968Batıda Kan Var— 'Cheyenne'
1967Silahların Saati— Doc Holliday
1967The St. Valentine's Day Massacre— Al Capone
1967Divorce American Style— Nelson Downes
1967The Belle of 14th Street— Performer
1967The Strange Case of Dr. Jekyll and Mr. Hyde— Dr. Henry Jekyll / Mr. Edward Hyde
1966Any Wednesday— John Cleves
1966A Big Hand for the Little Lady— Henry Drummond
1966Noon Wine— Royal Earle Thompson
1966The Face of Genius— Self - Narrator (voice)
1965A Thousand Clowns— Murray
1964Abe Lincoln in Illinois— Abraham Lincoln
1963Act One— George S. Kaufman
1962Günden Geceye— Jamie Tyrone
1962Tender Is the Night— Dick Diver
1961By Love Possessed— Julius Penrose
1960The Bat— Detective Anderson
1959For Whom the Bell Tolls— Robert Jordan
1959The Journey— Paul Kedes
1959A Doll's House— Dr. Rank
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