Pernell Elvin Roberts, Jr. (May 18, 1928 – January 24, 2010) was an American stage, movie and television actor as well as singer. In addition to guest starring in over 60 television series, he was widely known for his roles as Ben Cartwright's eldest son, Adam Cartwright, on the western series Bonanza, a role he played from 1959 to 1965 — and as chief surgeon Dr. John McIntyre, the title character on Trapper John, M.D. (1979–1986). He was also widely known for his life-long activism, which included participation in the Selma to Montgomery marches in 1965 and pressuring NBC to refrain from hiring whites to portray minority characters. Description above from the Wikipedia article Pernell Roberts, licensed under CC-BY-SA, full list of contributors on Wikipedia.
1993Diagnosis: Murder (2, 1 Episode) as Dr. Elliott Valin, George Fallon
1991FBI: The Untold Stories (23 Episodes) as Unknown
1990Donor as Dr. Simon Martingale
1990Checkered Flag as Andrew Valiant
1989Perry Mason: The Case of the All-Star Assassin as Thatcher Horton
1989Around the World in 80 Days (3 Episodes) as Captain Speedy
1988The Night Train to Kathmandu as Prof. Harry Hadley-Smithe
1987Desperado as Marshal Dancey
1986Realm of the Alligator as Narrator
1985Night of 100 Stars II as Self
1982Hotel (1 Episode) as Unknown
1982Night of 100 Stars as Self
1981Incident at Crestridge as Mayor Hill
1980High Noon, Part II: The Return of Will Kane as Marshal J.D. Ward
1979Trapper John, M.D. (151 Episodes) as "Trapper" John McIntyre
1979Hot Rod as Sheriff Marsden
1979The Night Rider as Alex Sheridan
1978The Immigrants as Anthony Cassala
1978Centennial (12 Episodes) as General Asher
1978Vega$ (3 Episodes) as Unknown
1978The Magic of Lassie as Jamison
1977The Love Boat (2 Episodes) as Brian Mallory
1977Man from Atlantis (1 Episode) as Clint Hollister
1977Charlie Cobb: Nice Night for a Hanging as Sherrif Yates
1977The Hardy Boys / Nancy Drew Mysteries (2 Episodes) as Detective Superintendant Molly
1976Battle of the Network Stars (2 Episodes) as Unknown
1976Quincy, M.E. (2 Episodes) as Sheriff Connelly
1976Captains and the Kings (8 Episodes) as Colonel Elbert Braithwaite
1976Spencer's Pilots (2 Episodes) as Unknown
1976Paco as Pompiho
1975Alien Lover as Mike
1975The Lives of Jenny Dolan as Camera Shop Proprietor
1975The Deadly Tower as Lt. Lee
1975Ellery Queen (1 Episode) as Rosh Kalee /Barney Groves /Major George Pearson
1975Switch (1 Episode) as Barnes
1975Medical Story (1 Episode) as Unknown
1975Bronk (1 Episode) as Collicos
1975Dead Man on the Run as Brock Dillon
1975Baretta (1 Episode) as Unknown
1974Police Woman (1 Episode) as Unknown
1974The Rockford Files (1 Episode) as B.J. Anderson
1974The Six Million Dollar Man (1 Episode) as Mark Wharton
1973Police Story (2 Episodes) as Unknown
1973Hawkins (1 Episode) as Senator Griffith
1972Jigsaw (7 Episodes) as Unknown
1972The Streets of San Francisco (1 Episode) as Charley Finn
1972Banacek (1 Episode) as Matthew Donniger
1972The Adventures of Nick Carter as Neal Duncan
1972The Sixth Sense (1 Episode) as Unknown
1972The Bravos as Jackson Buckley
1971Owen Marshall: Counselor at Law (1 Episode) as Ralph Foster
1971Alias Smith and Jones (2 Episodes) as Unknown
1970Night Gallery (1 Episode) as Unknown
1970San Francisco International as Jim Conrad
1970The Odd Couple (1 Episode) as Billy Joe
1969The Silent Gun as Sam Benner
1969Marcus Welby, M.D. (1, 1 Episode) as Roger, Tom Boyd
1969The Bold Ones: The New Doctors (1 Episode) as Dr. Frank Bartell
1969The Kashmiri Run as Unknown
1969Four Rode Out as Marshall Ross
1968Lancer (1 Episode) as Unknown
1968Hawaii Five-O (2 Episodes) as Lon Phillips
1968The Name of the Game (1, 1 Episode) as Hank, Ernie Subich
1967Mannix as Unknown
1967Carousel as Jigger Craigin
1967Ironside (1 Episode) as Frank Vincent
1966CBS Playhouse (1 Episode) as Unknown
1966Mission: Impossible (2, 1, 1 Episode) as President Beyron Rurich, Chief Manuel Corba, Col. Hans Krim
1966The Girl from U.N.C.L.E. (1 Episode) as Joey Celeste
1965The Wild Wild West (1 Episode) as Sean O'Reilley
1965The Big Valley (1, 1 Episode) as Madigan, Ed Tanner
1962The Merv Griffin Show (2 Episodes) as Self
1962The Virginian (1 Episode) as Jim Boyer Sr.
1959The Detectives (1 Episode) as Unknown
1959Bonanza (202 Episodes) as Adam Cartwright
1959Ride Lonesome as Sam Boone
1959One Step Beyond (1 Episode) as Sgt. Vaill
195877 Sunset Strip (1 Episode) as Unknown
1958Lawman (1 Episode) as Fent Harley
1958Cimarron City (1 Episode) as Unknown
1958Bronco (1 Episode) as Unknown
1958The Sheepman as Chocktaw Neal
1958Desire Under the Elms as Pierre Cabot
1958Shirley Temple's Storybook (1, 1, 1, 1 Episode) as Count Schoenfeld, Thorabore, Pau-Puk-Keewis, Count DeSpard
1957Trackdown (1 Episode) as Bannion
1957Sugarfoot (1, 1 Episode) as Salt River Smith, Deuce Braden
1957Have Gun, Will Travel (1 Episode) as Maury Travis
1956Dick Powell's Zane Grey Theatre (1, 1 Episode) as Jet Mason, Lew Banning
1955Matinee Theater (3 Episodes) as Hassan
1955Gunsmoke (1, 1 Episode) as Nat Pilcher, Dave Reeves
1953General Electric Theater (1 Episode) as Phil
1948Bambi (1 Episode) as Self (archive footage)