According to MSN and Russell's agent the beloved Professor of Gilligan's Island Russell Johnson dies of natural causes at the age of 89. Russell Johnson was the last surviving male castaway from Gilligan's Island that ran from 1964 to 1967. Johnson's acting career also included many early roles in western and sci-fi movies and TV shows. His career was at its peak in the late 1950s and to the early 1960's. He also appeared in two episodes of the "The Twilight Zone."