Series 8
World War II is over, but the Cold War simmers in the height of the 1946 London Summer. DCS Christopher Foyle has retired from police work when Britain's secret intelligence service compels him to join its ranks. Reunited with his former colleague, newlywed Sam Wainwright, Foyle faces new-but no less deadly-threats in the world of spies and counterintelligence.
The Eternity Ring
Fresh from a stay in America, Foyle encounters MI5 agents Hilda Pierce and Arthur Valentine, who draw him into the hunt for a suspected Russian spy ring. As part of his investigation, Foyle reconnects with Sam, now working for a nuclear scientist and married to political candidate Adam Wainwright.
The Cage
Looking into the deaths of several high-ranking Russian defectors, Foyle finds ties to the apparent suicide of an unidentified Russian man and the disappearance of a young woman. His search leads him to a government listening station that may not be what it appears.
Sunflower
When an MI5 intelligence asset fears for his life, Foyle must protect the ex-Nazi from assassination attempts - and American authorities. Meanwhile, a new MP Adam tries to help a farmer reclaim his land and uncovers information that could threaten his career.