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