From Wikipedia, the free encyclopedia Russell David Johnson (November 10, 1924 – January 16, 2014) was an American actor, best known for his role as Professor Roy Hinkley in Gilligan's Island. Military career After graduating from high school, Johnson enlisted in the United States Army Air Forces as an aviation cadet. On completing his training, he was commissioned a second lieutenant. He flew 44 combat missions in the Pacific Theater during World War II as a bombardier in B-25 twin-engined m...