Pernell Elven Roberts, Jr. was an American stage, movie and television actor, as well as a singer. In addition to guest starring in over 60 television series, he was best known for his roles as Ben Cartwright's eldest son Adam Cartwright on the Western TV series Bonanza, and as chief surgeon Dr. John McIntyre, the title character on Trapper John, M.D..
He was also known for his lifelong activism, which included participation in the Selma to Montgomery marches in 1965 and pressuring NBC to refrai...
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