The effect is a slow-burn murder mystery that continues to chill audiences to this very day.
The Greenwich Village apartment setting was filmed at Paramount Studios on a gigantic indoor set. The set also featured an extensive drainage system, which was built to accommodate the rain sequence that took place in the movie. In addition, a complex lighting system was constructed to pattern natural lighting effects for both the day and nighttime scenes. The effect is a slow-burn murder mystery that continues to chill audiences to this very day.