Chester Morris

Horatio 'Boston Blackie' Black / Cyrus Peyton

Lynn Merrick

Geraldine 'Gerry' Peyton

Richard Lane

Inspector Farraday

Frank Sully

Sgt. Matthews

George E. Stone

The Runt

Claire Carleton

Mamie Kirwin

Russell Hicks

Attorney Harcourt (uncredited)

Charles Lane

Hack Hagen (uncredited)

Erik Rolf

Smiley Slade (uncredited)

John Tyrrell

Policeman (uncredited)

Emmett Vogan

Coroner (uncredited)

Wanda Perry

Tenant in Hallway (uncredited)