Gilligan's Island S03 E19 Lovey's Secret Admirer

"A three-hour tour"

Mrs. Howell starts receiving mysterious love notes, and the source remains a mystery until Mr. Howell is caught in the act. Mrs. Howell dreams that she is Cinderella, and Gilligan is her fairy godfather. The Professor rigs up a lie detector using the ship's horn and batteries from the radio.