Sabotage Squad

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]