To Switch a Witch is an episode of the television series Scooby-Doo, Where Are You!. It first aired September 30, 1978.
Plot[]
On Halloween night, the New England town of Salem, Massachusetts is being haunted by the ghost of the witch Milissa Wilcox, who was burned at the stake in 1778. After receiving a distressed call from their friend Arlene Wilcox, a descendant of the accused witch, the gang arrives to help, despite being warned off by the town's mayor. The gang realizes the witch looks exactly like Arlene.