Dec 21, 2013 Updated: 9:27 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
Tom learns of an assassination plot targeting a top British official and he enlists the help of Zoe and Danny to prevent the murder. Danny: David Oyelowo. Zoe: Keeley Hawes.
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