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Lucas goes undercover aboard a merchant ship on which a known member of Al Qaeda is traveling to the UK. The ship is soon taken over by terrorists and it becomes clear that they are planning a coordinated attack of some sort. Lucas isn't the only MI-5 agent on board but Lucas' main help in the operation comes from a private security officer, Beth Bailey. Back in London, Harry Pierce has a particularly difficult encounter with the former Home Secretary, Nicholas Blake. Harry decides that it's time to retire but is again faced with making life and death decisions. Written by garykmcd
All Episodes - S09