Chinese sleuth Charlie Chan discovers a scheme for the theft of government radar plans while investigating several murders.
as Charlie Chan
as Tommy Chan
as Birmingham Brown, Chauffeur
as Capt. Flynn
as Rolf Brot, alias Ralph Brett
as Mrs. Marsh
as Willie Rand
as Gloria Bayne
as Ben Carter
as Hulda Swenson / Janet Carter
as Diane Hall
as Horace Karloss
as Mr. Chester, program announcer
as Mr. Hamilton
as Henchman Cooper
as Detective (uncredited)
as Nelson (uncredited)
as Police Radio Expert (uncredited)
as Herbert Sinclair (uncredited)
as Det. Hodge (uncredited)
as Horace Karlos (uncredited)
as Chemist (uncredited)
as Sgt. McGraw (uncredited)
as Rausch (uncredited)
