Gregory Harrison (born May 31, 1950).
Gregory Neale Harrison is an American actor. He is known for his roles as Chandler in the film North Shore (1957); as Dr. George Alonzo "Gonzo" Gates, the young surgeon assistant of Dr. Trapper John McIntyre (played by Pernell Roberts) on the CBS series Trapper John, M.D.(1979–86); and as ruthless business tycoon Michael Sharpe in the CBS series Falcon Crest (1989–1990). Since 2015, he has played Joe O'Toole, father of Oliver, in the Hallmark Channel expansion films of Signed, Sealed and Delivered.
He appeared with Donna Reed in the TV movie The Best Place To Be (1979) in the role of Rick Jawlosky, which pushed him toward stardom.