Warner Oland

Charlie Chan

Boris Karloff

Gravelle

Keye Luke

Lee Chan

William Demarest

Sergeant Kelly

Guy Usher

Inspector Regan

Margaret Irving

Mme. Lilli Rochelle

Gregory Gaye

Enrico Borelli

Nedda Harrigan

Mme. Lucretia Borelli

Frank Conroy

Mr. Whitely

Charlotte Henry

Mlle. Kitty

Thomas Beck

Phil Childers

Maurice Cass

Mr. Arnold

Tom McGuire

Pop Morris - Stage Doorman

Marc Lawrence

Undetermined Minor Role (uncredited) (unconfirmed)

Joan Woodbury

Dancer in Opera (uncredited)

H. Bruce Humberstone