ccc　　Episode1-TheEternityRing                                   　　MI5suspectsBritishatomicresearchhasbeeninfiltrated,andaskFoyletoinvestigatewhetheraRussianspynetworkcouldbeatworkintheheartofLondon.                                   　　Episode2-TheCage                                   　　Foyle’sinvestigationintothedeathofanamelessRussianleadstoamysteriousmilitaryfacilityandthediscoverythatthevictimwasaspywithdangerousconnectionstoBritishintelligence.                                   　　Episode3-Sunflower                                   　　ProfessorPeterVanHarengivesalecturetoagroupofstudentsontheself-portraitsoftheartistRembrandtandcausesayoungmantosufferafrighteningflashbackwhichendsintragedy.