Bruce Bennett

Lieutenant John Cronin

Kay Harris

Edith Cassell

Edward Norris

Eddie Miller

Sidney Blackmer

Carlyle Harrison

George McKay

Charles 'Chuck' Brown

John Tyrrell

John Fuller

Don Beddoe

Police Inspector Hanley

Robert Emmett Keane

Mr. Conrad

Lester Dorr

Middle Barber [script name: Harry]

Eddie Laughton

George, end barber [script name only: Felix]

Kenneth MacDonald

Recruiting Station Doctor

Byron Foulger

Bomber

John Dilson

Guthrie

Al Hill

Booking Room Sergeant

Shirley Patterson

Miss Cole, secretary

Edward Hearn

Dynamite Truck Driver

Stanley Brown

Smoke Shop Clerk

Ernie Adams

Smoke Shop Customer

Ethan Laidlaw

Office Henchman

Harry Tenbrook

Unspecified Saboteur

Hugh Prosser

Unspecified Saboteur

Eddie Bruce

? - [script name: Clancy]

Cyril Ring

? - [script name: Jefferson]

Edmund Cobb

Officer Brody