Hugh Sinclair

Character: Humphrey Mansfield

Griffith Jones

Character: James Brodie

Francis L. Sullivan

Character: Leon Poiccard

Frank Lawton

Character: James Terry

Anna Lee

Character: Ann Lodge

Alan Napier

Character: Sir Hamar Ryman M.P.

Basil Sydney

Character: Frank Snell

Lydia Sherwood

Character: Myra Hastings

Edward Chapman

Character: B.J. Burrell

Athole Stewart

Character: Police Commissioner

George Merritt

Character: Inspector Falmouth

Garry Marsh

Character: Bill Grant

Ellaline Terriss

Character: Lady Willoughby

Roland Pertwee

Character: Mr Hastings

Eliot Makeham

Character: Simmons

Frederick Piper

Character: Pickpocket (uncredited)

Henrietta Watson

Character: Mrs. Truscott

Jon Pertwee

Character: Rally campaigner (uncredited)

Liam Gaffney

Character: Taxi driver (uncredited)

Manning Whiley

Character: (uncredited)

Neal Arden

Character: (uncredited)

Basil Radford

Character: (uncredited)

Edward Rigby

Character: (uncredited)

Paul Sheridan

Character: (uncredited)

Winston Churchill

Character: Self (archive footage) (uncredited)

Arthur Hambling

Character: Constable Benham

Bryan Herbert

Character: Taxi driver (uncredited)

Adolf Hitler

Character: Self (archive footage) (uncredited)

James Knight

Character: Policeman Outside Parliament (uncredited)

Percy Parsons

Character: American Broadcaster (uncredited)

Charles Paton

Character: Platform Speaker (uncredited)

Percy Walsh

Character: Prison Governor (uncredited)