Charlie Chan
Warner Oland*
Charlie Chan
Warner Oland
Gravelle
Boris Karloff
Lee Chan
Keye Luke
Mlle. Kitty
Charlotte Henry
Sergeant Kelly
William Demarest
Inspector Regan
Guy Usher
Phil Childers
Thomas Beck
Mme. Lilli Rouchelle
Margaret Irving
Mme. Lilli Rochelle
Margaret Irving
Enrico Barelli
Gregory Gaye
Mme. Lucretia Barelli
Nedda Harrigan
Mr. Whitely
Frank Conroy
Mr. Arnold
Maurice Cass
Pop Morris - Stage Doorman
Tom McGuire
Undetermined Minor Role (uncredited) (unconfirmed)
Marc Lawrence
Cop
Fred Kelsey
Newspaper Wire-Photo Technician
Selmer Jackson
Dancer in Opera (uncredited)
Joan Woodbury
Newspaper Wire-Photo Technician
Emmett Vogan
Detective (uncredited)
William Bailey
Opera Supernumerary (uncredited)
Benson Fong
Soldier in Opera (uncredited)
Charles Bancroft
Murdered Orderly (uncredited)
John Bleifer
Backstage Cop Who Shoots Gravelle (uncredited)
Stanley Blystone
Villager in Opera (uncredited)
Myrta Bonillas
Guard (uncredited)
Raymond Brown
Dancer in Opera (uncredited)
Carita Crawford
Villager in Opera (uncredited)
Patrick Cunning
Mme. Rochelle (singing voice) (uncredited)
Zari Elmassian
Cop (uncredited)
Frank Fanning
Detective (uncredited)
Jim Farley
Opera Spectator (uncredited)
Adolph Faylauer
Cop (uncredited)
Larry Fisher
Opera Spectator (uncredited)
J.C. Fowler
Innkeeper (uncredited)
Otto Fries
Cop (uncredited)
Bud Geary
Villager in Opera (uncredited)
Milton Gowman
Villager in Opera (uncredited)
Herschel Graham
Detective (uncredited)
Harrison Greene
Opera Spectator (uncredited)
Julia Griffith