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)
