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The government introduces Draconian emergency measures in response to a series of terrorist attacks. MI5 fears that influential establishment figures are behind the attacks and may be planning a coup.

Alan McKenna, Anita McVeigh, David Phelan, Grant Parsons, Helen Anderson, Howard Teale, James Cash, John Castle, Lindsay Duncan, Mark Straker, Nicholas Jones, Robert Glenister, Roger Allam, Roger Ringrose, Simon Woods, Steve Nicolson