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