S2·E9 Judy, You're Not Yourself Today

Donald and Judy are a couple who find themselves in a game of witchcraft. When a mysterious woman convinces Judy to try on a magical necklace, the old woman switches their souls. Soon Donald realizes that something is wrong. He tricks the witch into thinking that Judy has cancer and they switch back. Then Donald kills the witch and buries her. Years later, she comes back and this time she's got a special surprise for him.