Oct 22, 2014 Updated: 9:52 AM
A modern, edgy drama full to the brim with passion, politics and peril. MI-5 leads us into the dangerous world of Britain's top-secret security agency, and into the lives of people who must lie, and sometimes die, for a living.
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In the Season 6 finale, Louisa has shocking news for Martin; Bert and Jennifer's party goes off with a bang; and Al makes Ruth a business proposition.
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