As WWII rages, DCS Foyle fights his own war on the home-front; investigating crime on the south coast of England. Later series, see the retired detective working as an MI5 agent in the aftermath of the war.
Cast:Michael Kitchen , Honeysuckle Weeks , Anthony Howell , Ellie Haddington , Julian Ovenden , Jay Simpson , Tim McMullan , Daniel Weyman , Jeremy Swift , Rupert Vansittart , Geoffrey Freshwater , Mali Harries , Michael Simkins , Hermione Gulliford , Max Brown , Alex Clatworthy , Jay Benedict , Jonah Lotan
MI5 suspects British atomic research has been infiltrated and asks Foyle to look into whether a Russian spy network could be at work in the heart of London.
Foyle's investigation into the death of a nameless Russian leads to a mysterious military facility and the discovery that the victim was a spy with dangerous connections to British intelligence.
Foyle is drawn into the bizarre murder of an ex-Nazi defector and leading expert on Soviet intelligence who had been working for MI5.