| 2017 | Arthur Miller: Writer | Self (archive footage) |
| 2017 | The Newspaperman: The Life and Times of Ben Bradlee | Self (archive footage) |
| 2016 | All Governments Lie: Truth, Deception, and the Spirit of I.F. Stone | Ben Bradlee (archive footage) |
| 2014 | And the Oscar Goes To... | Self (archive footage) |
| 2006 | Metallica: The Videos 1989-2004 | Joe's Father (video "One") |
| 2006 | Eugene O’Neill: A Documentary Film | Self |
| 2004 | Sam Peckinpah's West: Legacy of a Hollywood Renegade | Self (archive footage) |
| 2000 | That Moment: Magnolia Diary | Self |
| 2000 | Once Upon a Time: Sergio Leone | Self (archive footage) |
| 2000 | Going Home | Charles Barton |
| 1999 | Magnolia | Earl Partridge |
| 1999 | Kinski, il mio nemico più caro | Self (archive footage) |
| 1998 | Nemico pubblico | Congressman Phillip Hammersley (uncredited) |
| 1998 | Beloved | Mr. Bodwin |
| 1998 | The Real Macaw | Grandpa Girdis |
| 1998 | Heartwood | Logan Reeser |
| 1997 | Segreti | Larry Cook |
| 1997 | Truman | Narrator (voice) |
| 1996 | The West | Self - Brigham Young |
| 1996 | T.R.: The Story of Theodore Roosevelt | Narrator |
| 1995 | Allarme rosso | Rear Admiral Anderson (uncredited) |
| 1995 | Journey | Marcus |
| 1995 | My Antonia | Josea Burden |
| 1995 | The Great American West | Narrator (voice) |
| 1994 | Cronisti d'assalto | Graham Keighley |
| 1994 | Un lavoro da grande | Thomas Heywood |
| 1994 | Baseball | Various (voice) |
| 1994 | Nemico all'interno | General R. Pendleton Lloyd |
| 1994 | Over Washington D.C.: Our Nation's Capital | Narrator |
| 1993 | Philadelphia | Charles Wheeler |
| 1993 | La Classe américaine | The Newspaper Director (archive footage) |
| 1993 | Le avventure di Huck Finn | The King |
| 1993 | Heidi | Grandfather |
| 1993 | The Trial | Doctor Huld |
| 1993 | Sam Peckinpah: Man of Iron | Self |
| 1992 | Il mistero di Storyville | Clifford Fowler |
| 1992 | Lincoln | President Abraham Lincoln (voice) |
| 1992 | Deceptions | Clay (voice) |
| 1992 | The Peoples Palace: Secrets of the New York Public Library | Narrator |
| 1991 | Chernobyl - un grido dal mondo | Dr. Armand Hammer |
| 1991 | Mark Twain and Me | Mark Twain |
| 1991 | Empire of the Air: The Men Who Made Radio | Narrator (voice) |
| 1991 | The Perfect Tribute | President Abraham Lincoln |
| 1991 | An Inconvenient Woman | Jules Mendelson |
| 1990 | Scappiamo col malloppo | Chief Rotzinger |
| 1990 | The Civil War | Ulysses S. Grant |
| 1990 | Night of 100 Stars III | Self |
| 1989 | Parenti, amici e tanti guai | Frank Buckman |
| 1989 | Un piccolo sogno | Coleman Ettinger |
| 1989 | Arcobaleno nero | Walter Travis |
| 1989 | L'amico ritrovato | Henry Strauss |
| 1989 | Thomas Hart Benton | Narrator (voice) |
| 1988 | Le mille luci di New York | Mr. Hardy (uncredited) |
| 1988 | American Experience | Narrator (voice) |
| 1988 | Diritto d'amare | W. O. Muth |
| 1988 | 1925: processo alla scimmia | Harry Drummond |
| 1988 | The Christmas Wife | John Tanner |
| 1987 | Square Dance - Ritorno a casa | Dillard |
| 1987 | Laguna Heat | Wade Shephard |
| 1987 | Breaking Home Ties | Lloyd Wells |
| 1986 | Werner Herzog: Filmemacher | Self (archive footage) |
| 1986 | The Last Frontier | Ed Stenning |
| 1986 | Johnny Bull | Stephan Kovacs |
| 1985 | The Atlanta Child Murders | Alvin Binder |
| 1985 | The Long Hot Summer | Will Varner |
| 1985 | Empire City | Self - Narrator (voice) |
| 1984 | America and Lewis Hine | Voice |
| 1984 | Sakharov | Andrei Sakharov |
| 1984 | The World of Tomorrow | Self / Narrator |
| 1984 | You Can't Take it With You | Grandpa Martin Vanderhof |
| 1983 | The Day After - Il giorno dopo | Dr. Russell Oakes |
| 1983 | Qualcosa di sinistro sta per accadere | Charles Halloway |
| 1983 | Per fortuna c'è un ladro in famiglia | Max Dugan |
| 1983 | Reading Rainbow | Himself - Narrator (voice) |
| 1983 | The Time of Our Lives: The Most Amazing 60 Years in History | Self - Host |
| 1982 | Una nave carica di sogni | Fitzcarraldo (archive footage) |
| 1982 | Night of 100 Stars | Self |
| 1981 | La leggenda di Lone Ranger | President Ulysses S. Grant |
| 1980 | Blitz nell'oceano | Admiral James Sandecker |
| 1980 | Una volta ho incontrato un miliardario | Howard Hughes |
| 1980 | Caboblanco | Gunther Beckdorff |
| 1980 | F.D.R.: The Last Year | President Franklin D. Roosevelt |
| 1980 | Haywire | Leland Hayward |
| 1979 | Uragano | Capt. Charles Bruckner |
| 1979 | Broadway on Showtime | Erie Smith |
| 1978 | Arriva un cavaliere libero e selvaggio | Jacob 'J.W.' Ewing |
| 1978 | The Kennedy Center Honors | Self |
| 1978 | The Magic of David Copperfield | |
| 1978 | A Christmas to Remember | Daniel Larson |
| 1977 | Giulia | Dashiell Hammett |
| 1977 | Washington: Behind Closed Doors | President Richard Monckton |
| 1976 | Tutti gli uomini del Presidente | Ben Bradlee |
| 1976 | Addie and the King of Hearts | James "Jamie" Mills |
| 1976 | Tod eines Fremden | Inspector Barkan |
| 1975 | Apocalypse 2024 - Un ragazzo, un cane, due inseparabili amici | Lou Craddock |
| 1975 | Mr. Sycamore | John Gwilt |
| 1975 | The Easter Promise | James "Jamie" Mills |
| 1975 | A Moon for the Misbegotten | James Tyrone Jr. |
| 1974 | The Country Girl | Frank Elgin |
| 1973 | Pat Garrett e Billy the Kid | Governor Wallace |
| 1973 | The Thanksgiving Treasure | James "Jamie" Mills |
| 1973 | Old Faithful | Himself |
| 1972 | Oggi sposi: sentite condoglianze | Stephen Kozlenko |
| 1972 | Ghost Story | Elliot Brent |
| 1972 | The House Without a Christmas Tree | James "Jamie" Mills |
| 1971 | E Johnny prese il fucile | Joe's Father |
| 1971 | I terrificanti delitti degli assassini della via Morgue | Cesar Charron |
| 1971 | Great Performances | Grandpa Martin Vanderhof |
| 1970 | Tora! Tora! Tora! | Lt. General Walter C. Short |
| 1970 | La ballata di Cable Hogue | Cable Hogue |
| 1970 | 23 pugnali per Cesare | Marcus Brutus |
| 1970 | Rosolino Paternò, soldato... | Sam Armstrong |
| 1970 | Fools | Matthew South |
| 1968 | C'era una volta il West | 'Cheyenne' |
| 1968 | Isadora | Paris Singer |
| 1968 | Quella notte inventarono lo spogliarello | Raymond Paine |
| 1968 | The Dick Cavett Show | Self - Guest |
| 1967 | Il massacro del giorno di San Valentino | Al Capone |
| 1967 | L'ora delle pistole | Doc Holliday |
| 1967 | Divorzio all'americana | Nelson Downes |
| 1967 | The Belle of 14th Street | Self |
| 1967 | The Strange Case of Dr. Jekyll and Mr. Hyde | Dr. Henry Jekyll / Mr. Edward Hyde |
| 1966 | Posta grossa a Dodge City | Henry Drummond |
| 1966 | Tutti i mercoledì | John Cleves |
| 1966 | Noon Wine | Royal Earle Thompson |
| 1966 | ABC Stage 67 | Royal Earle Thompson |
| 1966 | The Face of Genius | Narrator (voice) |
| 1965 | L'incredibile Murray | Murray |
| 1964 | Abe Lincoln in Illinois | Abraham Lincoln |
| 1963 | Bob Hope Presents the Chrysler Theatre | |
| 1963 | Act One | George S. Kaufman |
| 1963 | The Danny Kaye Show | Self |
| 1962 | Il lungo viaggio verso la notte | Jamie Tyrone |
| 1962 | Tenera è la notte | Dick Diver |
| 1961 | Ossessione amorosa | Julius Penrose |
| 1960 | The Iceman Cometh | Theodore "Hickey" Hickman |
| 1960 | The Bat | Detective Anderson |
| 1959 | Il viaggio | Paul Kedes |
| 1959 | A Doll's House | Dr. Rank |
| 1959 | For Whom the Bell Tolls | Robert Jordan |
| 1959 | Play of the Week | |
| 1956 | Tony Awards | Self - Host |
| 1956 | Tony Awards | Self - Presenter |
| 1956 | Playhouse 90 | Robert Jordan |
| 1955 | The Alcoa Hour | Bert Palmer |
| 1953 | Oscars: La notte in diretta | Self |
| 1953 | General Electric Theater | Col. Carter |
| 1952 | Omnibus | |
| 1951 | Hallmark Hall of Fame | Dr. Rank |
| 1951 | Hallmark Hall of Fame | Marcus |
| 1951 | Hallmark Hall of Fame | Abe Lincoln |
| 1951 | Hallmark Hall of Fame | Frank Elgin |
| 1950 | What's My Line? | Self - Mystery Guest |
| 1948 | The Ed Sullivan Show | Self |
| 1948 | Studio One | Frank Cameron |
| 1948 | Studio One | Prisoner |
| 1948 | Studio One | Walter Osgood |
| 1948 | Studio One | Leonard O'Brien |
| 1948 | The Philco Television Playhouse | Joe Grant |
| 1948 | The Philco Television Playhouse | Mason |
