Weird Science (Season 5, Episode 15)

The main character's mother, who is jealous of a young woman at a party, is seduced by the wizard in the mirror and becomes an evil witch. Immediately she uses the magic of a magic mirror to track down and kidnap women that she considers more beautiful than she is, as the witch wants to be the most beautiful. The kidnapped women are frozen in time in the same pose as the moment they were taken, and reunited at the witch's house.