| Movie | 1999 | Magnolia | Earl Partridge | |
| Movie | 1976 | All the President's Men | Ben Bradlee | |
| Movie | 1959 | For Whom the Bell Tolls | Robert Jordan | |
| Movie | 1989 | Parenthood | Frank Buckman | |
| Movie | 1983 | Max Dugan Returns | Max Dugan | |
| Movie | 2017 | Arthur Miller: Writer | Self (archive footage) | |
| Movie | 1990 | Quick Change | Chief Rotzinger | |
| Movie | 1975 | A Boy and His Dog | Lou Craddock | |
| Movie | 1970 | Tora! Tora! Tora! | General Walter C. Short | |
| Movie | 1995 | The Great American West | Narrator (voice) | |
| Movie | 1973 | Pat Garrett & Billy the Kid | Governor Wallace | |
| Movie | 1980 | Caboblanco | Gunther Beckdorff | |
| Movie | 1970 | The Ballad of Cable Hogue | Cable Hogue | |
| Movie | 2000 | Once Upon a Time: Sergio Leone | Self (archive footage) | |
| Movie | 1983 | The Day After | Dr. Russell Oakes | |
| Movie | 1967 | Hour of the Gun | Doc Holliday | |
| Movie | 1983 | Something Wicked This Way Comes | Charles Halloway | |
| Movie | 1999 | My Best Fiend | Self (archive footage) | |
| Movie | 1980 | Raise the Titanic | Admiral James Sandecker | |
| Movie | 1994 | The Paper | Graham Keighley | |
| Movie | 1993 | The Adventures of Huck Finn | The King | |
| Movie | 1982 | Burden of Dreams | Fitzcarraldo (archive footage) | |
| Movie | 1978 | Comes a Horseman | Jacob 'J.W.' Ewing | |
| Movie | 1977 | Julia | Dashiell Hammett | |
| Movie | 2006 | Metallica: The Videos 1989-2004 | Joe's Father (video "One") | |
| Movie | 1970 | Julius Caesar | Marcus Brutus | |
| Movie | 1968 | Isadora | Paris Singer | |
| Movie | 1968 | The Night They Raided Minsky's | Raymond Paine | |
| Movie | 1967 | The St. Valentine's Day Massacre | Al Capone | |
| Movie | 1966 | Any Wednesday | John Cleves | |
| Movie | 1965 | A Thousand Clowns | Murray | |
| Movie | 1962 | Long Day's Journey Into Night | Jamie Tyrone | |
| Movie | 1966 | A Big Hand for the Little Lady | Henry Drummond | |
| Movie | 1989 | Dream a Little Dream | Coleman Ettinger | |
| Movie | 1971 | Murders in the Rue Morgue | Cesar Charron | |
| Movie | 1971 | Johnny Got His Gun | Joe's Father | |
| Movie | 1981 | The Legend of the Lone Ranger | President Ulysses S. Grant | |
| Movie | 1980 | Melvin and Howard | Howard Hughes | |
| Movie | 1988 | Bright Lights, Big City | Mr. Hardy (uncredited) | |
| Movie | 1997 | A Thousand Acres | Larry Cook | |
| Movie | 1993 | The Trial | Doctor Huld | |
| Movie | 1989 | Black Rainbow | Walter Travis | |
| Movie | 1972 | The House Without a Christmas Tree | James "Jamie" Mills | |
| Movie | 2006 | Eugene O’Neill: A Documentary Film | Self | |
| Movie | 1998 | The Real Macaw | Grandpa Girdis | |
| Movie | 1989 | Reunion | Henry Strauss | |
| Movie | 1959 | The Journey | Paul Kedes | |
| Movie | 1994 | The Enemy Within | General R. Pendleton Lloyd | |
| Movie | 1987 | Square Dance | Dillard | |
| Movie | 1993 | Sam Peckinpah: Man of Iron | Self | |
| Movie | 1967 | Divorce American Style | Nelson Downes | |
| Movie | 1984 | You Can't Take it With You | Grandpa Martin Vanderhof | |
| Movie | 1991 | Mark Twain and Me | Mark Twain | |
| Movie | 1988 | The Good Mother | W. O. Muth | |
| Movie | 1988 | The Christmas Wife | John Tanner | |
| Movie | 1997 | Truman | Narrator (voice) | |
| Movie | 1975 | A Moon for the Misbegotten | James Tyrone Jr. | |
| Movie | 1961 | By Love Possessed | Julius Penrose | |
| Movie | 1985 | Empire City | Self - Narrator (voice) | |
| Movie | 1992 | Storyville | Clifford Fowler | |
| Movie | 1991 | Empire of the Air: The Men Who Made Radio | Narrator (voice) | |
| Movie | 1984 | America and Lewis Hine | Voice | |
| Movie | 1972 | The War Between Men and Women | Stephen Kozlenko | |
| Movie | 1963 | Act One | George S. Kaufman | |
| Movie | 1967 | The Belle of 14th Street | Self | |
| Movie | 1988 | Inherit the Wind | Harry Drummond | |
| Movie | 1970 | Fools | Matthew South | |
| Movie | 1995 | My Antonia | Josea Burden | |
| Movie | 1980 | F.D.R.: The Last Year | President Franklin D. Roosevelt | |
| Movie | 1980 | Haywire | Leland Hayward | |
| Movie | 1989 | Thomas Hart Benton | Narrator (voice) | |
| Movie | 1993 | Philadelphia | Charles Wheeler | |
| Movie | 2017 | The Newspaperman: The Life and Times of Ben Bradlee | Self (archive footage) | |
| Movie | 1992 | Deceptions | Clay (voice) | |
| Movie | 1970 | Operation Snafu | Sam Armstrong | |
| Movie | 1984 | Sakharov | Andrei Sakharov | |
| Movie | 1998 | Heartwood | Logan Reeser | |
| Movie | 1995 | Journey | Marcus | |
| Movie | 1990 | Night of 100 Stars III | Self | |
| Movie | 1975 | Mr. Sycamore | John Gwilt | |
| Movie | 1975 | The Easter Promise | James "Jamie" Mills | |
| Movie | 1992 | Lincoln | President Abraham Lincoln (voice) | |
| Movie | 1966 | Noon Wine | Royal Earle Thompson | |
| Movie | 1994 | Over Washington D.C.: Our Nation's Capital | Narrator | |
| Movie | 1978 | A Christmas to Remember | Daniel Larson | |
| Movie | 1976 | Addie and the King of Hearts | James "Jamie" Mills | |
| Movie | 1967 | The Strange Case of Dr. Jekyll and Mr. Hyde | Dr. Henry Jekyll / Mr. Edward Hyde | |
| Movie | 1960 | The Iceman Cometh | Theodore "Hickey" Hickman | |
| Movie | 1979 | Hurricane | Capt. Charles Bruckner | |
| Movie | 1976 | The Spy Who Never Was | Inspector Barkan | |
| Movie | 1994 | Little Big League | Thomas Heywood | |
| Movie | 1983 | The Time of Our Lives: The Most Amazing 60 Years in History | Self - Host | |
| Movie | 1973 | The Thanksgiving Treasure | James "Jamie" Mills | |
| Movie | 2000 | Going Home | Charles Barton | |
| Movie | 1986 | Portrait: Werner Herzog | Self (archive footage) | |
| Movie | 1991 | The Perfect Tribute | President Abraham Lincoln | |
| Movie | 2016 | All Governments Lie: Truth, Deception, and the Spirit of I.F. Stone | Ben Bradlee (archive footage) | |
| Movie | 1960 | The Bat | Detective Anderson | |
| Movie | 1991 | Chernobyl: The Final Warning | Dr. Armand Hammer | |
| Movie | 2000 | That Moment: Magnolia Diary | Self | |
| Movie | 1987 | Laguna Heat | Wade Shephard | |
| Movie | 1959 | A Doll's House | Dr. Rank | |
| Movie | 1987 | Breaking Home Ties | Lloyd Wells | |
| Movie | 1998 | Beloved | Mr. Bodwin | |
| Movie | 2014 | And the Oscar Goes To... | Self (archive footage) | |
| Movie | 1973 | Old Faithful | Self | |
| Movie | 1993 | La Classe américaine | The Newspaper Director (archive footage) | |
| Movie | 1996 | T.R.: The Story of Theodore Roosevelt | Narrator | |
| Movie | 1962 | Tender Is the Night | Dick Diver | |
| Movie | 1968 | Once Upon a Time in the West | 'Cheyenne' | |
| Movie | 1998 | Enemy of the State | Congressman Phillip Hammersley (uncredited) | |
| Movie | 1995 | Crimson Tide | Rear Admiral Anderson (uncredited) | |
| Movie | 2004 | Sam Peckinpah's West: Legacy of a Hollywood Renegade | Self (archive footage) | |
| Movie | 1986 | Johnny Bull | Stephan Kovacs | |
| Movie | 1964 | Abe Lincoln in Illinois | Abraham Lincoln | |
| Movie | 1974 | The Country Girl | Frank Elgin | |
| Movie | 1984 | The World of Tomorrow | Self / Narrator | |
| Movie | 1992 | The Peoples Palace: Secrets of the New York Public Library | Self - Narrator (voice) | |
| Movie | 1966 | The Face of Genius | Narrator (voice) | |
| Movie | 1982 | Night of 100 Stars | Self | |
| Movie | 1991 | Rabbit Ears - Jonah and the Whale | Narrator (voice) | |
| Movie | 1991 | When It Was a Game | (voice) | |
| Movie | 1993 | Heidi | Großvater | |
| Movie | 1992 | When It Was a Game 2 | Passage Narrator (voice) | |
| Movie | 1987 | Happy 100th Birthday, Hollywood | Self | |
| Movie | 1980 | Ghosts of Cape Horn | Narrator | |
| TV Show | 1952 | Omnibus | | 1 |
| TV Show | 1948 | Studio One | Frank Cameron | 1 |
| TV Show | 1953 | General Electric Theater | Col. Carter | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Dr. Rank | 1 |
| TV Show | 1959 | Play of the Week | | 1 |
| TV Show | 1990 | The Civil War | Ulysses S. Grant | 9 |
| TV Show | 1955 | The Alcoa Hour | Bert Palmer | 1 |
| TV Show | 1963 | Bob Hope Presents the Chrysler Theatre | | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Joe Grant | 1 |
| TV Show | 1966 | ABC Stage 67 | Royal Earle Thompson | 1 |
| TV Show | 1953 | The Oscars | Self | 2 |
| TV Show | 1977 | Washington: Behind Closed Doors | President Richard Monckton | 6 |
| TV Show | 1978 | The Kennedy Center Honors | Self | 1 |
| TV Show | 1972 | Ghost Story | Elliot Brent | 1 |
| TV Show | 1996 | The West | Self - Brigham Young | 9 |
| TV Show | 1991 | An Inconvenient Woman | Jules Mendelson | 2 |
| TV Show | 1985 | The Long Hot Summer | Will Varner | 2 |
| TV Show | 1978 | The Magic of David Copperfield | | 1 |
| TV Show | 1979 | Broadway on Showtime | Erie Smith | 1 |
| TV Show | 1983 | Reading Rainbow | Self - Narrator (voice) | 1 |
| TV Show | 1948 | The Ed Sullivan Show | Self | 1 |
| TV Show | 1988 | American Experience | Narrator (voice) | 7 |
| TV Show | 1993 | Heidi | Grandfather | 2 |
| TV Show | 1986 | The Last Frontier | Ed Stenning | 2 |
| TV Show | 1985 | The Atlanta Child Murders | Alvin Binder | 2 |
| TV Show | 1950 | What's My Line? | Self - Mystery Guest | 1 |
| TV Show | 1948 | Studio One | Prisoner | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Marcus | 1 |
| TV Show | 1948 | Studio One | Walter Osgood | 1 |
| TV Show | 1948 | Studio One | Leonard O'Brien | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Abe Lincoln | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Frank Elgin | 1 |
| TV Show | 1956 | Playhouse 90 | Robert Jordan | 2 |
| TV Show | 1956 | Tony Awards | Self - Host | 1 |
| TV Show | 1956 | Tony Awards | Self - Presenter | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Mason | 1 |
| TV Show | 1968 | The Dick Cavett Show | Self - Guest | 1 |
| TV Show | 1963 | The Danny Kaye Show | Self | 1 |
| TV Show | 1994 | Baseball | (voice) | 5 |
