Bob Denver Gilligan Actor Alan Hale Jr. Jonas "The Skipper" Grumby Actor Jim Backus Thurston Howell III Actor Natalie Schafer Mrs. Lovey Howell Actor Tina Louise Ginger Grant Actor Russell Johnson Roy "The Professor" Hinkley Actor Dawn Wells Mary Ann Summers Actor Denny Miller Duke Williams Guest Star Tony Leader Director Jack Arnold Producer Charles Tannen Writer Lou Huston Writer