: Biological warfare research comes to the forefront when a truck drops a sheep, leading to a localized outbreak of anthrax. As Sam Stewart falls terminally ill from the infection, Foyle uncovers a web of military secrets and a murder tied to a conscientious objector. Bleak Midwinter (December 1942)
The show's attention to historical detail is impressive, from the costumes and settings to the nuanced portrayal of characters from all walks of life. The series also features a range of historical references, including the Home Front, the black market, and the early days of the NHS. Foyle--s War Series 4