Sam Lowry

Lee Patterson

Inspector O'Neill

Eddie Byrne

Anne Ford

Betty McDowall

Sir David Rogers

Ewen Solon

Clarke

George Rose

Dr. Tranter

John Le Mesurier

Music Hall Manager / O'Reilly

Philip Leaver

Kitty Knowles

Barbara Burke

Helen

Anne Sharpe

Helen Morris

Anne Sharp

Simes

Denis Shaw

Louis Benz

Endre Muller

Nelly

Esma Cannon

Blake

George Woodbridge

Lord Tom Sopwith

Bill Shine

Drunken Woman

Marianne Stone

Dr. Urquhart

Garard Green

Margaret / Maggie

Dorinda Stevens

Assistant Commissioner

Jack Allen

Hazel

Jane Taylor

Onlooker at 2nd Murder Scene (uncredited)

John Barrett

Rowdy Woman in the Crowd (uncredited)

Patricia Phoenix

Snakey

Hal Osmond

Beth

Jennifer White

Station Sgt.

George Street

Mrs. Bolton

Olwen Brooks

1st Victim

Helena Digby

Sonja Gerhardt

Falk Hentschel

Nicholas Farrell

Sabin Tambrea

Peter Gilbert Cotton

Vladimir Burlakov

Funda Vanroy

Simes

Dennis Shaw