Gilligan's Island (1964)

S1E21 Big Man on Little Stick

Duke Williams, a charming surfer, arrives on the island riding a massive tsunami. The castaways are thrilled, believing he’ll head back to Hawaii and bring help. However, upon meeting Mary Ann and Ginger, Duke considers sticking around. Faced with the prospect of him staying longer, the castaways devise a strategy to convince him to return to Hawaii instead.