Chester Morris

as Horatio 'Boston Blackie' Black

Erik Rolf

as Dooley Watson

Jeanne Bates

as Mary Watson

Richard Lane

as Insp. John Farraday

George E. Stone

as The Runt

Lloyd Corrigan

as Arthur Manleder

Douglas Fowley

as Nails Blanton (Uncredited)

Sid Melton

as Benny Hines (Uncredited)

Ray Teal

as Policeman Joe (Uncredited)

Maude Eburne

as Edna Counihan (Uncredited)

Arthur Hunnicutt

as Elwood "Tex" Stewart (Uncredited)

Cy Kendall

as Jumbo Madigan (Uncredited)

Larry Olsen

as Johnny Watson (Uncredited)

Pierre Watkin

as State Governor Rutledge (Uncredited)

Walter Sande

as Detective Sergeant Matthews (Uncredited)

Jack Carr

as Carpet Man (Uncredited)

Richard Alexander

as Carpet Man (Uncredited)

George Anderson

as Warden J.A. Edwards (Uncredited)

Jessie Arnold

as Woman in Hallway (Uncredited)

Trevor Bardette

as Manny Vogel (Uncredited)

Eddie Bruce

as Sandy (Uncredited)

Sally Cairns

as Richie Adair (Uncredited)

Eddy Chandler

as Policeman Frank (Uncredited)

James Conaty

as Parole Board Member (Uncredited)

Heinie Conklin

as Police Desk Sergeant (Uncredited)

Marie De Becker

as Miss Bailey (Uncredited)

Sayre Dearing

as Reporter at Parole Board Hearing (Uncredited)

Minta Durfee

as Woman in Hallway (Uncredited)

Ben Erway

as Prison Warden Root (Uncredited)

Jerry Frank

as George Phillips (Uncredited)

Joel Friedkin

as Joe Painter (Uncredited)

Kit Guard

as Wilfred Thompson (Uncredited)

John Harmon

as Red Taggart (Uncredited)

Carl M. Leviness

as Parole Board Member (Uncredited)

George Magrill

as Policeman (Uncredited)

Al Murphy

as William Jones (Uncredited)

Forbes Murray

as Chairman of Parole Board (Uncredited)

Frank O'Connor

as Policeman (Uncredited)

Brian O'Hara

as Parker Gray (Uncredited)

Dick Rush

as Policeman Lally (Uncredited)

Harry Semels

as Jerome Wagner (Uncredited)

John Tyrrell

as Driver (Uncredited)

Bobby Hale

as British Newsman (uncredited)