Chester Morris as Horatio 'Boston Blackie' Black

Nina Foch as Sally Brown

Steve Cochran as Jimmy Casey

Richard Lane as Inspector Farraday

George E. Stone as The Runt

Frank Sully as Mathews

Iris Adrian as Martha

Harry Hayden as Arthur Manleder

Joe Devlin as Steve Caveroni

Dan Stowell as Hotel clerk

Phil Van Zandt as Dr. Fagle

Adele Roberts as Patricia Powers