
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.

Bonanza
TV • 1959

Diagnosis: Murder
TV • 1993

Diagnosis: Murder
TV • 1993

Mannix
TV • 1967

The Love Boat
TV • 1977

Ironside
TV • 1967

Hawaii Five-O
TV • 1968

Mission: Impossible
TV • 1966

Mission: Impossible
TV • 1966

Mission: Impossible
TV • 1966

Quincy, M.E.
TV • 1976

Have Gun, Will Travel
TV • 1957

Dick Powell's Zane Grey Theatre
TV • 1956

Dick Powell's Zane Grey Theatre
TV • 1956

The Virginian
TV • 1962

The Rockford Files
TV • 1974

The Merv Griffin Show
TV • 1962

The Six Million Dollar Man
TV • 1974