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]
Max Wagner
— Recruiting Sergeant
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
Al Herman
— Bookie in 'Cage'
Pat Lane
— Henchman Sam, trucker on phone
Ethan Laidlaw
— Office Henchman
Connie Evans
— Flower Shop Clerk
Jack Gardner
— Unspecified Gambler
Harry Tenbrook
— Unspecified Saboteur
Hugh Prosser
— Unspecified Saboteur
William Lally
— Unspecified Policeman
Brick Sullivan
— Unspecified Policeman
Eddie Bruce
— ? - [script name: Clancy]
Cyril Ring
— ? - [script name: Jefferson]