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James Stephenson
Philo Vance
Margot Stevenson
Hilda Lake
Henry O'Neill
Markham
Edward Brophy
Ryan
Sheila Bromley
Doris Delafield
Ralph Forbes
Tom McDonald
Donald Douglas
Philip Wrede
Martin Kosleck
Gamble
Jimmy Conlin
Dr. Doremus - Coroner
Edward Raquello
Eduardo Grassi
Creighton Hale
Du Bois - Fingerprint Man
Harry Strang
Hennessey - Markham's Assistant
Richard Kipling
Archer Coe
Wedgwood Nowell
Brisbane Coe
Bo Ling
Ling Toy
Terry
MacTavish (uncredited)
Herbert Anderson
First Reporter (uncredited)
Henry Blair
Hans Snauble (uncredited)
Egon Brecher
Austrian Judge (uncredited)
Harry Burns
Capt. Lugo (uncredited)
Yakima Canutt
Sorrento Sailor (uncredited)
Nat Carr
2nd Photographer (uncredited)
Glen Cavender
Train Porter Asked to Send Telegram (uncredited)
Loia Cheaney
Markham's Secretary (uncredited)
Frederick Giermann
Austrian Sergeant (uncredited)
Eddie Graham
Coroner's Assistant (uncredited)
John Harron
Third Reporter (uncredited)
Stuart Holmes
Hertz (uncredited)
William Hopper
Clerk at Hotel Nino in Chicago (uncredited)
Olaf Hytten
Charles (uncredited)
George Irving
Avery (uncredited)
Marion Lessing
Mrs. Fritz Snauble (uncredited)
Rolf Lindau
Aeronautics Department Sentry (uncredited)
Frank Mayo
Doorman (uncredited)
George Reeves
Steamship Clerk (uncredited)
John J. Richardson
4h Reporter (uncredited)
Cliff Saum
Investigator Snitken (uncredited)
Hans Schumm
Nazi Officer at Dock (uncredited)
Frank Wilcox
2nd Reporter (uncredited)
Jack Wise
1st Photographer (uncredited)
Maris Wrixon
Long-Distance Operator (uncredited)
Henry Zynda
Austrian Lieutenant (uncredited)
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