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 Rory Calhoun Jonathan Kincaid Guest Star Harold Sakata Ramoo Guest Star Leslie Goodwins Director Robert L. Rosen Producer Ben Gershman Writer William Freedman Writer