Summary: Charlie Chan investigates the theft of government radar papers (the laboratory is located in the same building as a radio station!) with the help of Number Three Son Tommy and comic sidekick Birmingham Brown. (imdb)

AKA: Scarlet Clue, The

Genre: Mystery

Country: USA

Directed By: Phil Rosen

Written By: Earl Derr Biggers, George Callahan

Starring: Benson Fong, Sidney Toler, Mantan Moreland, Virginia Brissac, Ben Carter, Robert Homans

More information at the Internet Movie Database