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