| # | Fact |
|---|
| 1 | Had played the Vice-President of the United States twice (in Advise & Consent (1962) and The Man (1972)), the President twice (in Advise & Consent (1962) and Earth II (1971)), and the Galactic President (in Battlestar Galactica (1978)). |
| 2 | He was a conscientious objector during World War II, which made him rather unpopular at the studio. |
| 3 | He was awarded 2 Stars on the Hollywood Walk of Fame for Motion Pictures at 6385 Hollywood Boulevard; and for Radio at 1724 Vine Street in Hollywood, California. |
| 4 | Biography in: "American National Biography". Supplement 1, pp. 22-23. New York: Oxford University Press, 2002. |
| 5 | His wife, Diana Hall, is a former flight attendant. |
| 6 | As a child, he wanted to be a doctor. |
| 7 | Had one son with Diana Hall: Justin Ayres. |
| 8 | Big Band musician before becoming an actor. His instruments were tenor banjo, long-neck banjo and guitar. |
| 9 | Had portrayed the title character for the syndicated radio show "The Story of Dr. Kildare" (1950-1951). |
| 10 | Following his death, he was interred next to Frank Zappa at Westwood Village Memorial Park Cemetery in Los Angeles, California. |
| 11 | Born at 12:15am-CST |
| 12 | Died in his sleep after being in a coma for several days. |
| Title | Year | Status | Character |
|---|
| Big News | 1929 | | Copyboy (uncredited) |
| The Sophomore | 1929 | | Sophomore Fraternity Brother (uncredited) |
| Hart to Hart: Crimes of the Hart | 1994 | TV Movie | Prof. Cabel |
| Cast the First Stone | 1989 | TV Movie | Martin |
| Highway to Heaven | 1985-1989 | TV Series | Ivan Zelenka / Frank Worton / Harry Haynes |
| L.A. Law | 1989 | TV Series | Lorimar Henderson |
| Cagney & Lacey | 1988 | TV Series | Conrad Minton |
| Outlaws | 1987 | TV Series | Timothy Jared Wade |
| The A-Team | 1986 | TV Series | Bernie Greene |
| Simon & Simon | 1986 | TV Series | Justin Carter |
| Lime Street | 1985-1986 | TV Series | Henry Wade Culver |
| Under Siege | 1986 | TV Movie | John Pace |
| Finder of Lost Loves | 1984 | TV Series | Oliver Hawthorne |
| The World of Don Camillo | 1984 | | Doc |
| Hotel | 1984 | TV Series | Nelson O'Neil |
| Fame | 1984 | TV Series | Bert Kline |
| Savage in the Orient | 1983 | TV Movie | Allan Clydesdale |
| Fantasy Island | 1979-1983 | TV Series | John Cook / J.D. Pettigrew |
| Quincy M.E. | 1983 | TV Series | Prof. Henry Lester Hillman |
| The Devlin Connection | 1982 | TV Series | Wedemeyer |
| Little House on the Prairie | 1982 | TV Series | Lem McCary |
| Trapper John, M.D. | 1982 | TV Series | Dr. Chambers |
| Knots Landing | 1982 | TV Series | Andrew Douglas |
| Of Mice and Men | 1981 | TV Movie | Candy |
| Magnum, P.I. | 1981 | TV Series | Sidney Dollinger |
| The Love Boat | 1981 | TV Series | Carl Hooper |
| Reunion | 1980 | TV Movie | Bob Hollander |
| Letters from Frank | 1979 | TV Movie | Dan Miller |
| Salem's Lot | 1979 | TV Movie | Jason Burke |
| Suddenly, Love | 1978 | TV Movie | Mr. Graham |
| Flying High | 1978 | TV Series | Wilbur Dodson |
| Greatest Heroes of the Bible | 1978 | TV Series | Noah |
| Battlestar Galactica | 1978 | TV Series | President Adar |
| Battlestar Galactica | 1978 | | President Adar |
| Damien: Omen II | 1978 | | Bill Atherton |
| Wonder Woman | 1977 | TV Series | Dr. Kenneth Wilson |
| End of the World | 1977 | | Beckerman |
| The Fantastic Journey | 1977 | TV Series | Rayat |
| Mary Tyler Moore | 1977 | TV Series | Doug Booth |
| The Bionic Woman | 1977 | TV Series | Dr. Elijah Cooper |
| Francis Gary Powers: The True Story of the U-2 Spy Incident | 1976 | TV Movie | Allen Dulles |
| Hawaii Five-O | 1968-1976 | TV Series | The Governor / Comm. Reginald Blackwell / Dr. Elias Haig |
| McMillan & Wife | 1975 | TV Series | Ambassador Justin Sinclair |
| Kung Fu | 1974 | TV Series | Beaumont |
| The Magician | 1974 | TV Series | Max Braden |
| Columbo | 1974 | TV Series | Dr. Howard Nicholson |
| Heatwave! | 1974 | TV Movie | Dr. Grayson |
| The Questor Tapes | 1974 | TV Movie | Vaslovik |
| Hawkins | 1973 | TV Series | Gus Bitterman |
| Battle for the Planet of the Apes | 1973 | | Mandemus |
| The Streets of San Francisco | 1973 | TV Series | Harlan Edgerton |
| The Stranger | 1973 | TV Movie | Prof. Dylan MacAuley |
| Owen Marshall, Counselor at Law | 1972 | TV Series | |
| The Man | 1972 | | Noah Calvin |
| The Biscuit Eater | 1972 | | Mr. Ames |
| She Waits | 1972 | TV Movie | Dr. Sam Carpenter |
| Earth II | 1971 | TV Movie | President Charles Carter Durant |
| The Interns | 1971 | TV Series | Dr. Holt |
| San Francisco International Airport | 1970 | TV Series | Jess Murray |
| The Virginian | 1970 | TV Series | Judge John Markham |
| The Doris Day Show | 1970 | TV Series | William Tyler |
| My Three Sons | 1970 | TV Series | Professor Harper |
| Marcus Welby, M.D. | 1969 | TV Series | Dr. Andrew Swanson |
| Here Come the Brides | 1969 | TV Series | Muncey |
| The Big Valley | 1967-1968 | TV Series | Jason Fleet / Sheriff Roy Kingston |
| Gunsmoke | 1967 | TV Series | Jonathan Cole |
| ABC Stage 67 | 1966 | TV Series | Arthur |
| The F.B.I. | 1966 | TV Series | Marshall Winslow |
| I Spy | 1966 | TV Series | Dr. Owen Maclean |
| Slattery's People | 1965 | TV Series | Spencer Champion Carlisle |
| Kraft Suspense Theatre | 1965 | TV Series | Dr. Thomas Clay |
| Mark Dolphin | 1965 | TV Movie | |
| Ben Casey | 1964 | TV Series | Thomas W. Hardin |
| The Carpetbaggers | 1964 | | 'Mac' McAllister |
| Channing | 1964 | TV Series | Joshua Tillett |
| Laramie | 1962 | TV Series | Dr. Samuel Mudd |
| Saints and Sinners | 1962 | TV Series | Judge Victor Llewelyn |
| Advise & Consent | 1962 | | The Vice President - Harley Hudson |
| Bus Stop | 1962 | TV Series | John Benson |
| The Barbara Stanwyck Show | 1961 | TV Series | Dr. Paul Harris |
| Zane Grey Theater | 1956-1961 | TV Series | Jesse Martin / Jud Lester / Clint Howard |
| The DuPont Show with June Allyson | 1960 | TV Series | Howard Moon |
| Route 66 | 1960 | TV Series | Frank Bartlett |
| Alcoa Theatre | 1958-1959 | TV Series | Nathan Hardy / Jed Risk |
| Pursuit | 1958 | TV Series | John Conrad |
| Westinghouse Desilu Playhouse | 1958 | TV Series | Dr. Samuel A. Mudd |
| Frontier Justice | 1958 | TV Series | Clint Howard / Himself - Host |
| Climax! | 1958 | TV Series | Bob Kilgore |
| Cavalcade of America | 1957 | TV Series | Matt Needham |
| Schlitz Playhouse | 1956 | TV Series | |
| Playhouse 90 | 1956 | TV Series | Carl Doss |
| The Ford Television Theatre | 1956 | TV Series | Father John Gerald |
| Screen Directors Playhouse | 1956 | TV Series | Dr. John Mohler |
| Omnibus | 1954 | TV Series | |
| Donovan's Brain | 1953 | | Dr. Patrick J. Cory |
| No Escape | 1953 | | John Howard Tracy |
| New Mexico | 1951 | | Captain Hunt |
| The Capture | 1950 | | Vanner |
| Johnny Belinda | 1948 | | Dr. Robert Richardson |
| The Way of Peace | 1947 | Short | Narrator (voice) |
| The Unfaithful | 1947 | | Larry Hannaford |
| The Dark Mirror | 1946 | | Dr. Scott Elliott |
| Fingers at the Window | 1942 | | Oliver Duffy |
| Dr. Kildare's Victory | 1942 | | Dr. James Kildare |
| Dr. Kildare's Wedding Day | 1941 | | Dr. James Kildare |
| The People vs. Dr. Kildare | 1941 | | Dr. James Kildare |
| Maisie Was a Lady | 1941 | | Bob Rawlston |
| Dr. Kildare's Crisis | 1940 | | Dr. James 'Jimmy' Kildare |
| Dr. Kildare Goes Home | 1940 | | Dr. James Kildare |
| The Golden Fleecing | 1940 | | Henry Twinkle |
| Dr. Kildare's Strange Case | 1940 | | Dr. James 'Jimmy' Kildare |
| Remember? | 1939 | | Sky Ames |
| The Secret of Dr. Kildare | 1939 | | Dr. James 'Jimmy' Kildare |
| These Glamour Girls | 1939 | | Philip S. Griswold |
| Calling Dr. Kildare | 1939 | | Dr. James Kildare |
| Broadway Serenade | 1939 | | James Geoffrey Seymour |
| The Ice Follies of 1939 | 1939 | | Eddie Burgess |
| Spring Madness | 1938 | | Sam Thatcher |
| Young Dr. Kildare | 1938 | | Dr. James Kildare |
| Rich Man, Poor Girl | 1938 | | Henry Thayer |
| Holiday | 1938 | | Ned Seton |
| King of the Newsboys | 1938 | | Jerry Flynn |
| Scandal Street | 1938 | | Joe McKnight |
| Hold 'Em Navy | 1937 | | Tommy Graham |
| The Last Train from Madrid | 1937 | | Bill Dexter |
| The Crime Nobody Saw | 1937 | | Nick Milburn |
| Murder with Pictures | 1936 | | Kent Murdock |
| Lady Be Careful | 1936 | | Chester aka Dynamite |
| Shakedown | 1936 | | Bob Sanderson |
| Panic on the Air | 1936 | | Jerry Franklin |
| The Leathernecks Have Landed | 1936 | | Woodruff 'Woody' Davis |
| Silk Hat Kid | 1935 | | Eddie Howard |
| Spring Tonic | 1935 | | Caleb Enix |
| The Lottery Lover | 1935 | | Cadet Frank Harrington |
| Servants' Entrance | 1934 | | Erik Landstrom |
| She Learned About Sailors | 1934 | | Larry Wilson |
| Let's Be Ritzy | 1934 | | Jimmy Sterling |
| Cross Country Cruise | 1934 | | Norman Winthrop |
| My Weakness | 1933 | | Ronnie Gregory |
| Don't Bet on Love | 1933 | | Bill McCaffery |
| State Fair | 1933 | | Pat Gilbert |
| Okay America! | 1932 | | Larry Wayne |
| Night World | 1932 | | Michael Rand |
| The Cohens and Kellys in Hollywood | 1932 | | Lew Ayres |
| The Impatient Maiden | 1932 | | Dr. Myron Brown |
| Heaven on Earth | 1931 | | States |
| The Spirit of Notre Dame | 1931 | | Bucky O'Brien |
| Up for Murder | 1931 | | Robert Marshall |
| Iron Man | 1931 | | Kid Mason |
| Many a Slip | 1931 | | Jerry Brooks |
| East Is West | 1930 | | Billy Benson (as Lewis Ayers) |
| The Doorway to Hell | 1930 | | Louie |
| Common Clay | 1930 | | Hugh Fullerton |
| All Quiet on the Western Front | 1930 | | Paul (as Lewis Ayres) |
| The Kiss | 1929 | | Pierre |
| Title | Year | Status | Character |
|---|
| That's Entertainment, Part II | 1976 | Documentary performer: "For Ev'ry Lonely Heart" 1939 - uncredited | |
| Fingers at the Window | 1942 | "Over the Rainbow" 1939, uncredited | |
| Remember? | 1939 | performer: "Bridal Chorus Here Comes the Bride" 1850 - uncredited | |
| Broadway Serenade | 1939 | "For Ev'ry Lonely Heart" 1939, "The Blue Danube Waltz, Opus 314" 1867, "One Look at You" 1939, uncredited / lyrics: "Auld Lang Syne" 1788 - uncredited / performer: "For Ev'ry Lonely Heart" 1939, "Yip-I-Addy-I-Ay" 1908, "What You Goin' to Do When the Rent Comes 'Round? Rufus Rastus Johnson Brown" 1905, "Hearts Win, You Lose", "Love's Old Sweet Song Just a Song at Twilight" 1884, "A-Tisket A-Tasket" 1938, "Here We Go 'Round The Mulberry Bush", "None But the Lonely Heart Nur Wer die Sehnsucht Kennt | |
| The Ice Follies of 1939 | 1939 | performer: "Happy Days Are Here Again" 1929 - uncredited | |
| Rich Man, Poor Girl | 1938 | performer: "There's No Place Like Home Home, Sweet Home" 1823 - uncredited | |
| Holiday | 1938 | performer: "Bei mir bist du Schön" Uncredited, "The Oceana Roll" 1911 Uncredited, "Gwine to Rune All Night De Camptown Races" 1850 Uncredited, "The Sailor's Hornpipe" Uncredited | |
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