Episode 1 The Eternity Ring MI5 suspects British atomic research has been infiltrated, and ask Foyle to investigate whether a Russian spy network could be at work in the heart of London Episode 2 The Cage 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 Episode 3 Sunflower Professor Peter Van Haren gives a lecture to a group of students on the selfportraits of the artist Rembrandt and causes a young man to suffer a frightening flashback which ends in tragedy
