Over his 40-year career as one of Hollywood's veteran character actors, Robert Webber always marked his spot by playing all types of roles and was not stereotyped into playing just one kind of character. Sometimes he even got to play a leading role (see Hysteria (1965)). Webber first started out in small stage shows and a few Broadway plays and served a stint in the army before he landed the role of Juror 12 in 12 Angry Men (1957). He was also known for numerous war films, playing Lee Marvin's general in The Dirty Dozen (1967) or as real-life Admiral Frank J. Fletcher in Midway (1976). Webber's other best known movies include The Great White Hope (1970), Revenge of the Pink Panther (1978), 10 (1979) (as composer Dudley Moore's lyricist partner), Private Benjamin (1980), Wild Geese II (1985) and co-starring with Richard Dreyfuss and Barbra Streisand as prosecutor Francis McMillian in Nuts (1987). In 1989 he died of Lou Gehrig's disease (amyotrophic lateral sclerosis) in Malibu, California, shortly after completing the 1988 TV production Something Is Out There (1988) (TV). He bore a resemblance to character actor Kevin McCarthy.
| Movie | Sam Peckinpah's West: Legacy of a Hollywood Renegade | Self (archive footage) | 2004-07-25 |
| Series | Something Is Out There | Commissioner Estabrook | 1988-05-08 |
| Movie | The Ladies | Jerry | 1987-06-26 |
| Movie | Nuts | Francis MacMillan | 1987-11-20 |
| Movie | Assassin | Calvin Lantz | 1986-03-19 |
| Series | Moonlighting | Unknown | 1985-03-03 |
| Movie | Half Nelson | Harrison | 1985-03-24 |
| Movie | Wild Geese II | Robert McCann | 1985-10-18 |
| Movie | Answers | Ted Talbot (Segment "Twinkle, Twinkle") | 1985-04-30 |
| Movie | In Like Flynn | Col. Harper | 1985-08-14 |
| Movie | No Man's Land | Will Blackfield | 1984-05-27 |
| Movie | Getting Physical | Hugh Gibley | 1984-03-20 |
| Series | Cover Up | Unknown | 1984-09-22 |
| Movie | Starflight: The Plane That Couldn't Land | Felix | 1983-02-27 |
| Movie | Shooting Stars | Woodrow Norton | 1983-07-28 |
| Movie | Who Dares Wins | General Ira Potter | 1982-08-26 |
| Movie | Wrong Is Right | Harvey | 1982-04-16 |
| Movie | Don't Go to Sleep | Dr. Cole | 1982-12-10 |
| Movie | Not Just Another Affair | Professor Wally Dawson | 1982-10-01 |
| Movie | S.O.B. | Ben Coogan | 1981-07-01 |
| Movie | The Two Lives of Carol Letner | Ed Leemans | 1981-10-14 |
| Movie | All Stars | Harry Stabling | 1980-01-16 |
| Movie | Private Benjamin | Col. Clay Thornbush | 1980-10-06 |
| Movie | Sunday Lovers | Henry Morrison (segment "The French Method") | 1980-10-31 |
| Movie | Gardenia | Tony Caruso | 1979-05-05 |
| Movie | 10 | Hugh | 1979-10-05 |
| Movie | The Streets of L.A. | Ralph Salkin | 1979-11-13 |
| Movie | Courage fuyons | Charley | 1979-10-17 |
| Movie | Casey's Shadow | Mike Marsh | 1978-01-01 |
| Movie | Revenge of the Pink Panther | Philippe Douvier | 1978-01-08 |
| Movie | The Young Runaways | Fred Lockhart | 1978-05-28 |
| Series | Kaz | Unknown | 1978-09-10 |
| Movie | Death Steps in the Dark | Inspector | 1977-02-17 |
| Movie | Madame Claude | Howard | 1977-05-11 |
| Movie | The Accuser | American executive | 1977-09-07 |
| Movie | The Choirboys | Deputy Chief Riggs | 1977-12-23 |
| Series | Quincy, M.E. | Unknown | 1976-10-03 |
| Movie | Midway | Admiral Jack Fletcher | 1976-06-18 |
| Movie | Hit Squad | Mr. Douglas | 1976-10-29 |
| Movie | Death Stalk | Hugh Webster | 1975-01-21 |
| Movie | Pacific Challenge | Narrator | 1975-01-01 |
| Series | S.W.A.T. | Unknown | 1975-02-24 |
| Series | Switch | Unknown | 1975-09-09 |
| Movie | Flatfoot in Hong Kong | Sam Accardo | 1975-03-28 |
| Movie | The Dangerous Mission | Sergeant John Lewis | 1975-04-22 |
| Series | The Manhunter | Unknown | 1974-09-11 |
| Movie | Murder or Mercy | Dr. Eric Stoneman | 1974-04-10 |
| Movie | Bring Me the Head of Alfredo Garcia | Sappensly | 1974-08-01 |
| Series | The Rockford Files | Roman Clementi | 1974-09-13 |
| Series | Police Woman | Unknown | 1974-09-13 |
| Movie | Double Indemnity | Edward Norton | 1973-10-13 |
| Series | Kojak | Unknown | 1973-10-24 |
| Movie | Cutter | Meredith | 1972-01-26 |
| Series | Search | Unknown | 1972-09-13 |
| Series | The Streets of San Francisco | Unknown | 1972-09-23 |
| Series | Banyon | Unknown | 1972-09-15 |
| Movie | Macédoine | Sanderberg | 1971-01-20 |
| Series | Cannon | Unknown | 1971-09-14 |
| Movie | $ | Attorney | 1971-12-15 |
| Movie | Thief | James Calendar | 1971-10-09 |
| Movie | The Movie Murderer | Karel Kessler | 1970-02-02 |
| Series | McCloud | Unknown | 1970-02-17 |
| Movie | The Great White Hope | Dixon | 1970-10-11 |
| Movie | Hauser's Memory | Dorsey | 1970-11-24 |
| Movie | The Big Bounce | Bob Rodgers | 1969-03-05 |
| Movie | Manon 70 | Ravaggi | 1968-02-21 |
| Movie | Every Man Is My Enemy | Tony Costa | 1967-01-01 |
| Series | Ironside | Unknown | 1967-03-28 |
| Movie | The Dirty Dozen | General Denton | 1967-06-15 |
| Series | Mannix | Unknown | 1967-09-16 |
| Movie | Don't Make Waves | Rod Prescott | 1967-06-20 |
| Movie | Harper | Dwight Troy | 1966-02-22 |
| Movie | The Hired Killer | Clint Harris | 1966-03-25 |
| Movie | The Silencers | Sam Gunther | 1966-02-18 |
| Series | Mission: Impossible | Unknown | 1966-09-17 |
| Movie | Dead Heat on a Merry-Go-Round | Milo Stewart | 1966-10-12 |
| Movie | Hysteria | Chris Smith | 1965-04-01 |
| Movie | A Statue for 'The Sandpiper' | Self | 1965-04-30 |
| Movie | The Sandpiper | Ward Hendricks | 1965-06-23 |
| Movie | The Third Day | Dom Guardiano | 1965-08-04 |
| Series | Arrest and Trial | Unknown | 1963-09-15 |
| Series | The Outer Limits | Unknown | 1963-09-16 |
| Movie | The Stripper | Ricky Powers | 1963-06-19 |
| Series | Kraft Suspense Theatre | Unknown | 1963-10-10 |
| Series | Bob Hope Presents the Chrysler Theatre | Unknown | 1963-10-04 |
| Series | The Fugitive | Unknown | 1963-09-17 |
| Series | The Greatest Show on Earth | Unknown | 1963-09-17 |
| Movie | The Nun and the Sergeant | Sgt. McGrath | 1962-01-01 |
| Series | Stoney Burke | Unknown | 1962-10-01 |
| Series | Ben Casey | Unknown | 1961-10-02 |
| Series | Thriller | Unknown | 1960-09-13 |
| Series | Route 66 | Unknown | 1960-10-07 |
| Series | One Step Beyond | Unknown | 1959-01-20 |
| Series | New York Confidential | Unknown | 1959-01-01 |
| Series | No Hiding Place | Unknown | 1959-09-16 |
| Series | Naked City | Unknown | 1958-09-30 |
| Series | The Rifleman | Unknown | 1958-09-30 |
| Series | Our Miss Pemberton | Vicar | 1957-01-03 |
| Movie | 12 Angry Men | Juror 12 | 1957-04-10 |
| Series | Alfred Hitchcock Presents | Unknown | 1955-10-02 |
| Series | Out There | Unknown | 1951-10-28 |
| Series | Tales of Tomorrow | Unknown | 1951-08-03 |
| Series | Robert Montgomery Presents | Unknown | 1950-01-30 |
| Movie | Highway 301 | William "Bill" Phillips | 1950-12-01 |
| Series | Suspense | Unknown | 1949-01-06 |
| Series | Studio One | Unknown | 1948-11-07 |