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'Bonanza' Star Pernell Roberts Dies at 81

Pernell Roberts Jr, who played the introspective eldest son of wealthy rancher Ben Cartwright on the hit TV western "Bonanza" and went on to star in medical drama "Trapper John, M.D.," has died. He was 81.

Roberts died at his Malibu home on Sunday of pancreatic cancer, said his spokesman, Richard Stone.