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