Ultimatum
Voltar
Barry JonesProfessor John Malcolm Francis Willingdon
André MorellSuperintendent G.W. Folland
Olive SloaneGoldie Phillips
Sheila ManahanAnn Willingdon
Hugh CrossStephen Lane
Joan HicksonMrs. Emily Georgina Peckett
Ronald AdamArthur Lytton, the Prime Minister
Marie NeyMrs. Willingdon
Joss AcklandStation Policeman
Marianne StoneWoman in Phone Box
John StrattonArmy Mechanic- George SpenceMan on Bus (sem créditos)