Russell David Johnson was an American actor. He played Professor Roy Hinkley in Gilligan's Island and Marshal Gib Scott in Black Saddle.

Roy Hinkley, referred to as the Professor, is one of the seven castaways from the television series Gilligan's Island (1964–67); he was played by Russell Johnson. The character was originally played by John Gabriel in the pilot episode, but the network thought he looked too young to have all the degrees attributed to the Professor.