Aug 21, 2014 Updated: 10:03 PM
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
Bert quits the plumbing trade to open a restaurant, but the opening doesn't go so well when Doc notices blood on his plate and, the next day, treats many with food-poisoning patients.
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