James DonaldMichael Heathley Phyllis CalvertLydia Heathley Noel WillmanDr. Dennis Bord Robert BeattyMaj. Sam Seagram Patric DoonanBrian Jackson Walter FitzgeraldSir Charles Craddock Muriel PavlowCaroline Cartier Maurice DenhamProf. Carrington Marjorie FieldingMichael's Mother Herbert LomasGeorge Jackson Cyril ChamberlainInspector Carter Stanley MaxtedProf. Adams Hartley PowerGeneral Adams (uncredited) Philip RaySentry (uncredited) Johnnie SchofieldJim Barnes (uncredited) John WarrenTed (uncredited) Antony DarnboroughProducer Earl St. JohnExecutive Producer Desmond DickinsonDirector Of Photography Stanley GrantAerial Director Of Photography W.T. PartletonMakeup Artist Julie HarrisCostume Design George PollockAssistant Director Yvonne AxeworthyContinuity Benjamin FrankelOriginal Music Composer John DennisSound Recordist Gordon K. McCallumSound Recordist Hugh AttwoollProduction Manager 
