Episode 1: High Castleee A university professor who had been working as a translator at the Nuremberg trials is stabbed to death. As Foyle investigates, he delves into the world of international oil politics and corrupt Nazi businessmen. Sam assists the murder inquiry by going undercover, despite her pregnancy. Episode 2: Trespass As Britain debates the creation of a Jewish state in Palestine, the son of a wealthy Jewish businessman is assaulted. The flames of anti-Semitism have recently been fanned in London by Charles Lucas, a right-wing writer, and Foyle suspects the attack was racially motivated. Episode 3: Elise After an attempt on Hilda Pierce's life, Foyle scrutinizes her work for SOE during the war. Could this be related to the deaths of nine SOE agents in France and rumors of a traitor called Plato?