Gilligan is bitten in the neck by a bat and fears he will transform into a vampire as a result. Gilligan's troubled sleep is haunted by a dream that he is indeed a vampire living in a European castle in 1895 where unsuspecting travelers and a famous detective and his doctor assistant appear at his doorstep. Will they be invited to stay for -or as- dinner?
A down on his luck producer, Harold Hecuba, appears on the island and refuses to make contact with his offshore boat until he has something to show on Broadway. After the castaways perform a musical version of Hamlet he slips away.
Gillian loses his rabbits foot in a cave, and finds buried clay items from earlier villagers. The cave also holds a witch doctor who decides to place curses on the castaways and put them in a voodoo spell.
Plain and homely Eva Grubb escapes the scorn and rejection of civilization in a motor boat and lands on Gilligan's island, where Ginger and Mary Ann are confident a Hollywood makeover can bring out Eva's hidden beauty and restore her self-confidence.