The "twist" ending where Marsha remembers her true nature and takes her place among the other mannequins, realizing it is someone else's turn to "live" for a month. Production Trivia
Marsha White, a demanding shopper, visits a large department store to find a specific gift—a gold thimble. After being directed to the "vacant" ninth floor by a mysterious elevator operator, she encounters a strange saleswoman who sells her a scratched thimble. Marsha soon realizes she is locked in the store after closing and discovers a terrifying secret about herself and the "people" she encountered.
The episode was written by series creator Rod Serling .