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