SeasonsevenofBritishspythriller"MI-5"openswithAdamCarter(RupertPenry-Jones)valiantlybattlingtomoveacarbombawayfromadenselypackedmemorialservice.MeanwhileHarrysecuresthereleaseofLucasNorth(RichardArmitage),aMI-5officerimprisonedinRussiaforeightyears.It’snotlong,however,beforeRosbeginstosuspectLucas’loyalties.TherestoftheseasondealswithatopsecretColdWar-eraoperationnamedSugarhorsccc
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