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