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.

Pernell Roberts

Acting Born May 18, 1928 – Died January 24, 2010 Waycross, Georgia, U.S.

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.

Known For

Diagnosis: Murder

Dr. Elliott Valin

Diagnosis: Murder

George Fallon

The Merv Griffin Show

Self

Mannix

The Love Boat

Brian Mallory

Bonanza

Adam Cartwright

Ironside

Frank Vincent

Hawaii Five-O

Lon Phillips

The Virginian

Jim Boyer Sr.

Mission: Impossible

President Beyron Rurich

Mission: Impossible

Chief Manuel Corba

Mission: Impossible

Col. Hans Krim