Sidney Toler
Charlie Chan
Acting
Benson Fong
Tommy Chan
Acting
Mantan Moreland
Birmingham Brown, Chauffeur
Acting
Robert Homans
Capt. Flynn
Acting
I. Stanford Jolley
Rolf Brot, alias Ralph Brett
Acting
Virginia Brissac
Mrs. Marsh
Acting
Jack Norton
Willie Rand
Acting
Janet Shaw
Gloria Bayne
Acting
Ben Carter
Ben Carter
Acting
Victoria Faust
Hulda Swenson / Janet Carter
Acting
Helen Deverell
Diane Hall
Acting
Leonard Mudie
Horace Karloss
Acting
Reid Kilpatrick
Mr. Chester, program announcer
Acting
Emmett Vogan
Mr. Hamilton
Acting
Crane Whitley
Henchman Cooper
Acting
Kernan Cripps
Detective (uncredited)
Acting
Charles Jordan
Nelson (uncredited)
Acting
Kenner G. Kemp
Police Radio Expert (uncredited)
Acting
Milton Kibbee
Herbert Sinclair (uncredited)
Acting
Frank Mayo
Det. Hodge (uncredited)
Acting
Leonard Mudie
Horace Karlos (uncredited)
Acting
Tom Quinn
Chemist (uncredited)
Acting
Charles Sherlock
Sgt. McGraw (uncredited)
Acting
Charles Wagenheim
Rausch (uncredited)
Acting