Ep 4. War of Nerves

Foyle's War season 3 episode 4, titled "War of Nerves," sees Christopher Foyle (Michael Kitchen) and Sam Stewart (Honeysuckle Weeks) investigating a string of threatening letters sent to several prominent individuals in the area. The letters are all signed by "The Watcher" and warn of dire consequences if certain demands are not met.

The investigation takes a turn when one of the targeted individuals, a wealthy businessman named Sir Leonard Spencer-Jones (Geoffrey Bayldon), is found dead in his home. The team soon discovers that he had been killed with a rare poison. As they dig deeper, they realize that all of the victims had some connection to the war effort.

Meanwhile, Foyle's son Andrew (Julian Ovenden) is home on leave from the military and eager to help with the investigation. He becomes involved with a young woman named Hilda Pierce (Ellie Haddington), who works for MI5 and is investigating possible spy activity in the area. Together, they uncover a web of deceit and betrayal that ultimately leads to a shocking discovery.

Throughout the episode, Foyle must navigate the complex political landscape of wartime Britain, dealing with corrupt officials, spies, and powerful businessmen. His steadfast determination and unwavering commitment to justice are put to the test as he unravels a sinister plot and tries to bring those responsible to justice.

"War of Nerves" is a gripping thriller that tackles themes of patriotism, betrayal, and the high stakes of war. With its intricate plotting, well-drawn characters, and historical accuracy, this episode showcases the best of the acclaimed series Foyle's War.