February 1941: Foyle again pursues a position that would allow him to contribute more to the war effort. But a local murder investigation sidetracks this endeavor as Foyle finds himself caught between rival spy organizations.

February 1941: When a local manor house is commandeered for use as a special burn unit for treating injured RAF pilots, Foyle is called in to investigate a series of strange accidents.

April 1941: Foyle questions three Land Army girls about a murder that occurs on a Hastings farm.

A.C. Rose orders Foyle to delegate his investigation of black marketing ring and personally look into the possibly seditious acts of a Socialist activist.

American troops arrive in Britain and the Corps of Engineers building an airstrip on a Hastings farm is met with resentment.

August 1942. Foyle investigates the a mysterious disease affecting local farm animals and looks into the arrest of a pacifist accused of stabbing a war hero.

The apparently accidental death of a young woman in a munitions factory becomes linked with the murder of Milner's estranged wife as he falls under suspicion.

Foyle has his hands full dealing with illegal gambling, sabotage, and his needy goddaughter who shows up on his doorstep with her traumatized son.