Aug 29, 2014 Updated: 1:14 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
Mrs. Tishell returns; Martin helps a beachcomber; Al and Morwenna each try Internet dating; and romance blossoms for Bert.
Find out about upcoming shows, special events, and discounts.