Chester Morris

Horatio 'Boston Blackie' Black

Trudy Marshall

Irene

Constance Dowling

Dinah Moran

Richard Lane

Inspector Farraday

George E. Stone

The Runt

Frank Sully

Sgt. Matthews

Warren Ashe

John Lampau, alias John Jani

Selmer Jackson

Warden Lund

Wanda Perry

Secretary (uncredited)

D. Ross Lederman