Gilligan's Island (1964)

S03E09 Ring Around Gilligan

Title: Gilligan's Hypnotic Dilemma Plot: An eccentric scientist arrives on the island and employs mind-controlling rings to manipulate the castaways into doing his bidding. Under his spell, they find themselves unwittingly assisting him in a sinister plot. His ultimate goal? To use the entranced group to pull off a heist at Fort Knox! As the castaways navigate the scientist's nefarious scheme, they must find a way to break free from the rings’ influence and thwart his plans before it's too late.