John Calvin, also known as Jack Calvin, (born November 29, 1947 in Staten Island, New York) is an American actor best known for his role as Reverend Willie Tenboom in the television action series Tales of the Gold Monkey, from 1982-1983. He portrayed Doctor Carl Durant in the 1989 CBS television film "Mike Hammer: Murder Takes All". John appeared as Buddy Wright in the episode of Quantum Leap titled "What Price Gloria?" He has not appeared on screen since 1995.