Gilligan's Island (1964)

S03E19 Lovey's Secret Admirer

Mrs. Howell begins to find enigmatic love letters, and the identity of the sender stays hidden until Mr. Howell is unexpectedly discovered. In a whimsical dream, Mrs. Howell imagines herself as Cinderella, with Gilligan playing the role of her fairy godfather. Meanwhile, the Professor invents a lie detector using the ship’s horn and some batteries from the radio, adding a scientific twist to the unfolding mystery.