The Twilight Zone: The After Hours (TV)

Marsha White is looking for a gold thimble as a gift for her mother. She can't find it anywhere in the store and an elevator operator suggests she try the 9th floor. She arrives there to find it abandoned but a sales clerk suddenly appears and has just what she is looking for. On the way back down to the main floor, she realizes the thimble she bought is scratched and goes to the complaints department where she is told there is no 9th floor in the building. She is shocked however to see a mannequin that looks just like the woman who served her. A return to the absent floor reveals the explanation to her dilemma.