Philo Vance
Hilda Lake
Markham
Ryan
Doris Delafield
Tom McDonald
Philip Wrede
Gamble
Dr. Doremus - Coroner
Eduardo Grassi
Du Bois - Fingerprint Man
Hennessey - Markham's Assistant
Archer Coe
Brisbane Coe
Ling Toy
MacTavish (uncredited)
First Reporter (uncredited)
Hans Snauble (uncredited)
Austrian Judge (uncredited)
Capt. Lugo (uncredited)
Sorrento Sailor (uncredited)
2nd Photographer (uncredited)
Train Porter Asked to Send Telegram (uncredited)
Markham's Secretary (uncredited)
Austrian Sergeant (uncredited)
Coroner's Assistant (uncredited)
Third Reporter (uncredited)
Hertz (uncredited)
Clerk at Hotel Nino in Chicago (uncredited)
Charles (uncredited)
Avery (uncredited)
Mrs. Fritz Snauble (uncredited)
Aeronautics Department Sentry (uncredited)
Doorman (uncredited)
Steamship Clerk (uncredited)
4h Reporter (uncredited)
Investigator Snitken (uncredited)
Nazi Officer at Dock (uncredited)
2nd Reporter (uncredited)
1st Photographer (uncredited)
Long-Distance Operator (uncredited)
Austrian Lieutenant (uncredited)