The announcer heard on the radio when part of The Mousetrap is being performed in this film is the same recording used in the actual stage play. That recording was made by the late actor Deryck Guyler in 1952 and is still in use to this day. Also the viewer can briefly see the clock above the fireplace. This is the only surviving prop from the original opening night of the show on October 6th 1952 and is still in use to this day.

Film

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