Chester Morris

Horatio 'Boston Blackie' Black

June Vincent

Doris Howell

Richard Lane

Insp. William R. Farraday

Patricia Barry

Joan Howell (as Patricia White)

George E. Stone

The Runt

Frank Sully

Sgt. Matthews

Edward Norris

Igor Borio

Fay Baker

Margie O'Reilly, alias Sandra Doray

William Forrest

Mason Carter

Sarah Selby

Claire Carter