As the nation heads towards a general election, Kathryn has to make a decision on the offer that Max has made to her. Meanwhile, Caden leaves the Rehabilitation Centre, returning to London and an uncertain future. How will Caden react to the news? Can Kathryn ever trust Max to keep his word? And where will the nation find itself after the most divisive of election campaigns? Concluding episode of the drama, starring Richard Gere, Helen McCrory, Billy Howle and Elena Anaya. Last in the series.