Eric Portman

Character: Paul Mangin

Edana Romney

Character: Mifanwy

Barbara Mullen

Character: Veronica

Hugh Sinclair

Character: Owen Rhys

Bruce Belfrage

Character: Sir David Conway

Joan Maude

Character: Caroline Hart

Leslie Weston

Character: Mortimer

Alan Wheatley

Character: Edgar Orsen

Hugh Latimer

Character: Bing

John Penrose

Character: Brandy

Christopher Lee

Character: Charles

Lois Maxwell

Character: Lois

Mavis Villiers

Character: Babs

Thora Hird

Character: Visitor in Tussauds

Valentine Dyall

Character: Counsel for the Defence (uncredited)

Susanne Gibbs

Character: Gwendoline (uncredited)

Noel Howlett

Character: Psychiatrist (uncredited)

Gordon McLeod

Character: Public Prosecutor (uncredited)