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