The Safe and Sane Halloween - S4-E8
Revealing mistake: In this episode when the Gremlin, Goblin, Jack-o-Lantern, and Sam are peeking in through the back window, the gremlin turns to look at Sam when she is speaking and his ear passes through the area where there is supposed to be glass.
Answer: The original diamond and white gold heart necklace was given to Elizabeth Montgomery by her then real-life husband, William Asher, who also directed the show. She wore it in nearly every early episode. When the necklace was lost or stolen about mid-way through the series, Montgomery had two replicas made from rhinestones. She wore either one of those for the rest of the show's run.
raywest ★