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