Jul 26, 2014 Updated: 11:16 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.
VISIT THE BBC's MI-5 WEB SITE
Doc helps the new police officer, who suffers from narcolepsy, but can't do much for the village plumber, who's suffering from a midlife crisis brought on by his son's world travels.
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