| Movie | 1997 | Absolute Power | Walter Sullivan | |
| Movie | 1954 | The Caine Mutiny | Lt. Comdr. Challee | |
| Movie | 1966 | Is Paris Burning? | Intelligence Officer Powell (uncredited) | |
| Movie | 1995 | Nixon | John Mitchell | |
| Movie | 1958 | The Buccaneer | Gov. William Claiborne | |
| Movie | 1957 | Man on Fire | Sam Dunstock | |
| Movie | 1970 | Tora! Tora! Tora! | Colonel Rufus S. Bratton | |
| Movie | 1989 | National Lampoon's Christmas Vacation | Art | |
| Movie | 1954 | Pushover | Police Lt. Carl Eckstrom | |
| Movie | 1966 | The Chase | Val Rogers | |
| Movie | 1980 | Superman II | The President | |
| Movie | 1959 | Compulsion | District Attorney Harold Horn | |
| Movie | 1954 | Broken Lance | Horace (The Governor) | |
| Movie | 1990 | Two Evil Eyes | Steven Pike | |
| Movie | 1960 | Cash McCall | Winston Conway | |
| Movie | 1978 | Interiors | Arthur | |
| Movie | 1969 | The Bridge at Remagen | Brig. Gen. Shinner | |
| Movie | 1992 | Consenting Adults | George Gordon | |
| Movie | 1955 | The Left Hand of God | Dr. David Sigman | |
| Movie | 1982 | Creepshow | Upson Pratt (segment "They're Creeping Up On You") | |
| Movie | 1986 | My Chauffeur | Witherspoon | |
| Movie | 1986 | Power | Senator Sam Hastings | |
| Movie | 1972 | Pursuit | James Wright | |
| Movie | 1956 | The Scarlet Hour | Lt. Jennings | |
| Movie | 1961 | Town Without Pity | Colonel Pakenham | |
| Movie | 1959 | The Journey | Harold Rhinelander | |
| Movie | 1952 | Diplomatic Courier | Military Police Jeep Driver (uncredited) | |
| Movie | 1979 | Disaster on the Coastliner | Roy Snyder | |
| Movie | 1971 | The Pursuit of Happiness | Daniel Lawrence | |
| Movie | 1991 | Ironclads | Commdr. Smith | |
| Movie | 1979 | The Lazarus Syndrome | Dr. Mendel | |
| Movie | 1976 | Collision Course: Truman vs. MacArthur | President Harry S. Truman | |
| Movie | 1966 | The Poppy Is Also a Flower | Coley Jones | |
| Movie | 1992 | Russian Holiday | Joe Meadows | |
| Movie | 1954 | Middle of the Night | Jerry | |
| Movie | 1957 | The Bachelor Party | Walter | |
| Movie | 1954 | The Bamboo Prison | Father Francis Dolan | |
| Movie | 1997 | The Defenders: Payback | Lawrence Preston | |
| Movie | 1983 | Thank You, Mr. President: The Press Conferences of JFK | Self - Host | |
| Movie | 1969 | The Littlest Angel | God | |
| Movie | 1971 | The City | Sheridan Hugotor | |
| Movie | 1986 | La gran fiesta | Judge Cropper | |
| Movie | 1982 | Eleanor, First Lady of the World | John Foster Dulles | |
| Movie | 1973 | Money to Burn | Jed Finnegan | |
| Movie | 1979 | Vampire | Harry Kilcoyne | |
| Movie | 1948 | Call Northside 777 | Rayska (uncredited) | |
| Movie | 1994 | Oldest Living Confederate Widow Tells All | Professor Taw | |
| Movie | 1998 | The Defenders: Choice of Evils | Lawrence Preston | |
| Movie | 1979 | HR 6161: An Act of Congress | Narrator | |
| Movie | 1981 | The Phoenix | Dr. Ward Frazier | |
| Movie | 1958 | The Plot to Kill Stalin | Beria | |
| Movie | 1989 | The Hijacking of the Achille Lauro | Stanley 'Stan' Kubacki | |
| Movie | 1986 | Under Siege | Harold Sloan | |
| Movie | 1983 | The Winter of Our Discontent | Mr. Baker | |
| Movie | 1956 | The Mountain | Solange | |
| Movie | 1975 | The Incredible Machine | Narrator | |
| Movie | 1977 | Billy Jack Goes to Washington | Sen. Joseph Paine | |
| Movie | 1993 | George Marshall and the American Century | Self - Narrator (voice) | |
| Movie | 1988 | An Empire of Reason | Federalist Spokesman | |
| Movie | 1983 | Saigon: Year of the Cat | The Ambassador | |
| Movie | 1954 | The Silver Chalice | Ignatius | |
| Movie | 1947 | Untamed Fury | Pompano, the dance caller | |
| Movie | 1956 | The Little Foxes | Oscar | |
| Movie | 1960 | The Master Builder | Solness | |
| Movie | 2006 | Superman II: The Richard Donner Cut | The President | |
| Movie | 1992 | Earth and the American Dream | Reader (voice) | |
| Movie | 1975 | The Abduction of Saint Anne | Bishop Francis Paul Logan | |
| Movie | 1957 | 12 Angry Men | Juror 4 | |
| Movie | 1997 | Miss Evers' Boys | The Senate Chairman | |
| Movie | 1949 | The Twentieth Century | | |
| Movie | 1970 | A Clear and Present Danger | Senator Stowe | |
| Movie | 1972 | Look Homeward, Angel | W. O. Gant | |
| Movie | 1993 | Tornadoes: The Entity | Narrator 1 | |
| Movie | 1992 | Lincoln | Gideon Welles (voice) | |
| Movie | 1971 | Ellery Queen: Don't Look Behind You | Dr. Cazalis | |
| Movie | 1983 | Born of Fire | Narrator | |
| Movie | 1963 | The Vote | Self - Host | |
| Movie | 1980 | Dive to the Edge of Creation | Self - Host | |
| Movie | 2004 | Harvesting Horror: Children of the Corn | (archival footage) | |
| Movie | 1976 | Independence | Narrator | |
| Movie | 1986 | Ike | Dwight David Eisenhower | |
| Movie | 1957 | Clash by Night | Jerry D'Amato | |
| Movie | 1988 | The Explorers: A Century of Discovery | | |
| Movie | 2000 | Walker Evans / America | Narrator | |
| TV Show | 1981 | Falcon Crest | Henri Denault | 3 |
| TV Show | 1984 | The Cosby Show | Stanley Rappaport | 1 |
| TV Show | 1969 | The Brady Bunch | | 1 |
| TV Show | 1960 | Route 66 | | 1 |
| TV Show | 1954 | Justice | | 1 |
| TV Show | 1985 | The New Alfred Hitchcock Presents | Charlie Pitt | 1 |
| TV Show | 1948 | Studio One | | 3 |
| TV Show | 1985 | The Equalizer | Senator Virgil Thomas Blake | 1 |
| TV Show | 1970 | Night Gallery | Jared Soames (segment "Death in the Family") | 1 |
| TV Show | 1953 | General Electric Theater | Jack | 1 |
| TV Show | 1960 | The Islanders | Curt Cober | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Grover Cleveland | 1 |
| TV Show | 1967 | Ironside | | 1 |
| TV Show | 1994 | Chicago Hope | Arthur Thurmond | 22 |
| TV Show | 1958 | Westinghouse Desilu Playhouse | | 1 |
| TV Show | 1959 | Rawhide | Ben Foley | 1 |
| TV Show | 1984 | Tales from the Darkside | Father | 1 |
| TV Show | 1961 | The Defenders | Lawrence Preston | 132 |
| TV Show | 1955 | The 20th Century Fox Hour | | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Alf Rylett | 1 |
| TV Show | 1971 | Vanished | Arthur Ingram | 2 |
| TV Show | 1949 | Suspense | Eddie Hunt | 1 |
| TV Show | 1950 | Robert Montgomery Presents | | 1 |
| TV Show | 1954 | Inner Sanctum | | 1 |
| TV Show | 1955 | Playwrights '56 | | 2 |
| TV Show | 1949 | Lights Out | | 3 |
| TV Show | 1981 | Nurse | Father | 1 |
| TV Show | 1949 | The Emmy Awards | Self | 1 |
| TV Show | 1988 | Tanner '88 | Gen. John Tanner | 1 |
| TV Show | 1987 | At Mother's Request | Franklin Bradshaw | 1 |
| TV Show | 1969 | The Bold Ones: The New Doctors | Dr. David Craig | 45 |
| TV Show | 1953 | General Electric Theater | O'Hoolihan | 1 |
| TV Show | 1983 | Kennedy | Joseph P. Kennedy | 3 |
| TV Show | 1955 | The Alcoa Hour | Herman Magnus | 1 |
| TV Show | 1993 | The Tommyknockers | Ev Hillman | 2 |
| TV Show | 1988 | Tanner '88 | General John Tanner | 0 |
| TV Show | 1950 | What's My Line? | Self - Mystery Guest | 1 |
| TV Show | 1955 | Alfred Hitchcock Presents | Ronald J. Grimes | 1 |
| TV Show | 1948 | Studio One | Harry Mork | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | Mr. Baker | 1 |
| TV Show | 1948 | Studio One | Everett Metcalf | 1 |
| TV Show | 1948 | Studio One | George Banks | 1 |
| TV Show | 1948 | Studio One | Aaron Kinney | 1 |
| TV Show | 1948 | Studio One | Dr. Shratt | 1 |
| TV Show | 1951 | Hallmark Hall of Fame | | 2 |
| TV Show | 1951 | Hallmark Hall of Fame | Oscar | 1 |
| TV Show | 1988 | Emma: Queen of the South Seas | President Ulysses S. Grant | 4 |
| TV Show | 1951 | Goodyear Television Playhouse | | 1 |
| TV Show | 1965 | National Geographic Specials | Narrator | 1 |
| TV Show | 1947 | Kraft Television Theatre | Mr. Lazarus | 1 |
| TV Show | 1962 | The Virginian | Judge Elmo J. Carver | 1 |
| TV Show | 1949 | Suspense | | 2 |
| TV Show | 1949 | Suspense | Gavin Stevens | 1 |
| TV Show | 1949 | Suspense | Abner Snopes | 1 |
| TV Show | 1948 | The Philco Television Playhouse | | 6 |
| TV Show | 1948 | The Philco Television Playhouse | Barnwell Rhett | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Horace Greeley | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Hiram Holliday | 1 |
| TV Show | 1948 | The Philco Television Playhouse | N. Y. Times editor | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Jerry | 1 |
| TV Show | 1948 | The Philco Television Playhouse | Dennis Leighton | 1 |
| TV Show | 1980 | A Capitol Fourth | Self | 44 |
| TV Show | 1968 | The Dick Cavett Show | Self - Guest | 3 |
| TV Show | 1951 | Casey, Crime Photographer | | 1 |
| TV Show | 1994 | Oldest Living Confederate Widow Tells All | Professor Taw | 2 |
| TV Show | 1984 | Murder, She Wrote | Prof. Leon Walker | 1 |
| TV Show | 1957 | Suspicion | Paul Steppe | 1 |
| TV Show | 1952 | Omnibus | Actor | 1 |
| TV Show | 1952 | Omnibus | | 1 |
| TV Show | 1958 | Shirley Temple's Storybook | Merchant | 1 |
| TV Show | 1958 | Shirley Temple's Storybook | Rip Van Winkle | 1 |
| TV Show | 1947 | Kraft Television Theatre | | 1 |
| TV Show | 1950 | The Bob Hope Show | Self | 1 |