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Chinese sleuth Charlie Chan (Sidney Toler) and son (Mantan Moreland) keep U.S. radar plans from spies.
Movie rating: 6.3 / 10 (1428)
Directed by: George Callahan - Phil Rosen - Earl Derr Biggers
Writer credits: Earl Derr Biggers - George Callahan
Cast: Sidney Toler - Mantan Moreland - Virginia Brissac - Ben Carter - Benson Fong
AKA: Charlie Chan: The Scarlet Clue, Charlie Chan in the Scarlet Clue