Highlights from season eight of "Foyle's War" include corrupt Nazi businessmen, oil politics, a pregnant undercover agent, anti-Semitism and an attempted assassination. Former detective Christopher Foyle is a senior intelligence officer with MI5 in the post-war era, and his investigations take on more complicated plots with international implications in the final season of the British crime series.
In episode one of season eight, titled "High Castle," Foyle investigates the murder of a translator for the Nuremberg war crimes trials. Foyle focuses on a U.S. oil tycoon involved with Russian spies and Nazis. Samantha Stewart Wainright, Foyle's driver, goes undercover as a companion to the suspect's father, without disclosing her pregnancy to Foyle.
In season eight's episode two, "Trespass," Foyle looks into an attack on the son of a Jewish businessman. In an atmosphere of increasing anti-Semitism surrounding a resolution to create a Jewish state in the Palestine and a conservative reporter manipulating the situation to create mistrust and hatred, Foyle believes the assault is related.
Season eight's episode three, "Elise," is the series finale. A young boy attempts to murder Foyle's MI5 superior, Hilda Pierce, out of revenge for his sister's death. As Foyle reviews Pierce's history during the war, he begins to fear a traitor's hand in the ranks of the Special Operations Executive.