Oct 25, 2014 Updated: 8:03 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
The live telecast of a U.K.-U.S.-Iran peace accord that includes Iran's agreement to suspend its uranium-enrichment program is disrupted by gunmen whose leader believes the deal is a sham.
Find out about upcoming shows, special events, and discounts.