It Happened Here

It Happened Here (1964) is a British black-and-white war film that tells the story of Pauline, an Irish district nurse who is evacuated from her village to London during the German occupation of Britain in World War II. She begins working for the Immediate Action Organisation (IAO), a quasi-paramilitary medical corps, but soon discovers the true nature of her work and the brutality of the occupation. After witnessing the arrest of her friends and participating in a forced euthanasia program, Pauline joins the British Resistance and helps fight to liberate the country with the arrival of American troops.