Herbert Marshall

as Self (archive footage)

as Self (archive footage)

as (archive footage)

as Austin Parsons

as Sir Wilfrid Lucas

as Dr. Jubal Harrington

as The Prime Minister

as Gov. Oliver P. Thornwall

as Charles Manning

as Henry Addison

as Insp. Charas

as Robert Harley Hedges

as Dr. Knight

as Stephen Collins

as Insp. Mackenzie

as Lord Leicester

as Dr. Donald L. Stanton / Narrator

as Dr. Van Ness

as William, Earl of Mackworth

as Mr. Charles Tremayne

as Dr Jameson

as E.J. Stanton

as Dr. James Curtis

as Archibald Craven

as Miles Rushworth

as Willard I. Whitcombe

as W. Somerset Maugham

as Scott Chavez

as Traybin

as Major John Hillgrove

as Dr. Charles Evans

as Self

as Dr. Standish

as Paul Turner

as Curate in Air Raid Shelter

as Prof. Michael Kingsley

as Geoffrey Wolfe

as Sen. John Coleridge

as Horace Giddens

as John Davis

as Rogers Woodruff

as Robert Crosbie

as Stephen Fisher

as Gray Meredith

as Richard Todd

as Dufresne

as Stephen Holland

as Jim Howard

as Jonathan Blair

as Sir Frederick Barker

as Dr. Stephen Dominik

as Thomas Lane

as Dr. Michael J. Talbot

as Christopher 'Chris' Drew

as Harry

as Alan Barclay

as Dr. Gordon Phillips

as Jim Buchanan

as Doctor Sporum

as Gerald Shannon

as Steven Gaye

as Lord Philip Rexford

as Napier

as Arnold Ainger

as Walter Fane

as Oliver Lane

as Stephan

as Waverly Ango

as Edward 'Ned' Faraday

as Gaston Monescu

as Count Franz von Degenthal

as Gerry Anson

as Michael Rowe

as Lord Danforth

as (archive footage)

as Sir John Menier

as Geoffrey Hammond

as Col. Armytage

as Sir John Dalman

as Dr. Morgan

as Father Anthony

as Simon Baker

as Sir John Menier (archive footage) (uncredited)

as Self

as Bo Barrett

as Self -Host

as Inspector Goole

as Self - Mystery Guest

as Enoch Gavin

as Colonel Beaumont