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