"A Chinese-American surgeon faces a moral dilemma after operating on the mob boss in charge of vice and protection rackets in her city's Chinatown."
Anna May Wong
as Dr. Mary Ling
Akim Tamiroff
as Frank Baturin
J. Carrol Naish
as The Professor
Sidney Toler
as Dr. Chang Ling
Philip Ahn
as Robert 'Bob' Li
Anthony Quinn
as Mike Gordon
Bernadene Hayes
as Dolly Warren
Roscoe Karns
as Rep Harrigan
Ray Mayer
as Potatoes
Richard Denning
as Interne
Archie Twitchell
as 2nd Interne
George Anderson
as Detective
Charles B. Wood
as 1st Gangster
George Magrill
as 2nd Gangster
Charles Trowbridge
as Dr. Jones
Lily King
as Chinese Woman
Chester Gan
as Mr. Foo
Pat West
as Announcer at Fight
Guy Usher
as Investigator
Raoul Freeman
as Detective (uncredited)
Eddie Marr
as Henchman Bert
Wong Chung
as Chinese Man
Sam Ash
as Barber (uncredited)
Marie Burton
as Nightclub Girl (uncredited)
Dolores Casey
Ethel Clayton
as Nightclub Patron (uncredited)
Sheila Darcy
Dorothy Dayton
Paula DeCardo
as Dancer (uncredited)
Norah Gale
George Golden
Harriette Haddon
Robert Homans
Gwen Kenyon
Judith King
Charles Lee
as Tommy Wu (uncredited)
Grace Lem
as Chinese Woman (uncredited)
Joyce Mathews
Larry McGrath
as Henchman (uncredited)
Ivan Miller
as Politician (uncredited)
Moy Ming
as Businessman (uncredited)
Helaine Moler
as Nightclub Woman (uncredited)
Alexander Pollard
as Heath - Baturin's Butler (uncredited)
Cyril Ring
as Fight Spectator (uncredited)
Ben Taggart
Jimmy Vaughn
as Slugger Grady (uncredited)
Luana Walters
Pierre Watkin
as Dist. Atty. Philips (uncredited)
Dorothy White
Gloria Williams
Florence Wix
Herbert J. Biberman
Story
Lillie Hayward
Screenplay
Harold Hurley
Producer
Irving Reis
Nick Grindé
Director
Hans Dreier
Art Direction
Robert Odell
Eda Warren
Editor
Edith Head
Costume Design
A. E. Freudeman
Set Decoration
Glenn Rominger
Sound Recordist
Leo Tover
Director of Photography
Charles Hisserich
Gerard Carbonara
Original Music Composer
John Leipold
Boris Morros
Music Director