The Crimson Key (1947) is a Mystery, Thriller film that follows larry Morgan, a private detective, is hired by a woman who wants Larry to trail her husband. The husband is murdered and, shortly afterwards, the wife is also killed. Larry shuffles through a long list of suspects before revealing the killer... The Crimson Key is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 4.5 out of 10 from 6 votes. Fans of mystery movies may also want to explore similar titles below.