继父大龟头太厉害了InseasonsixoftheBritishespionagethriller,theteamarepushedtotheirlimits,astherelationshipbetweenBritishandAmericansecuritydeterioratesandloyaltieschange.AdamandRosfightagainstanemergingterroristthreat,andadeadlyvirusthatcoulddecimateLondon.Thisseasonbreaksawayfromthecase-by-caseepisodicformat,withonedominantstorylinetyingalltheactiontogether.