The Scarlet Clue is a 1945 American film directed by Phil Rosen.

The film is also known as Charlie Chan in the Scarlet Clue (American informal title) and Charlie Chan: The Scarlet Clue in Australia. The film is in the public domain due to the omission of a valid copyright notice on original prints.

Premise:

Charlie Chan and his son Tommy and their block-head driver Birmingham Brown investigate the shenanigans and suspects that results from a furtive gang trying to steal radar secrets from a radio station.

Cast:

Sidney Toler as Charlie Chan

Benson Fong as Tommy Chan

Mantan Moreland as Birmingham Brown, Chauffeur

Virginia Brissac as Mrs. Marsh

Ben Carter as Ben Carter

Robert Homans as Capt. Flynn

Jack Norton as Willie Rand

Janet Shaw as Gloria Bayne

Helen Deverell as Diane Hall

Victoria Faust as Hulda Swenson / Janet Carter

Leonard Mudie as Horace Karlos

By Monogram Pictures (YouTube) [Public domain], via Wikimedia Commons

Info.