The Scarlet Clue (1945) is a Mystery, Thriller film that follows chinese sleuth Charlie Chan discovers a scheme for the theft of government radar plans while investigating several murders. Currently, you can watch The Scarlet Clue on Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 5.9 out of 10 from 22 votes. Fans of mystery movies may also want to explore similar titles below.