Oct 25, 2014 Updated: 1:47 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
In the Season 9 opener, Section D tracks a Somalian terrorist who may be moving a load of explosives on a boat from Tangier. Elsewhere, Lucas is visited by a ghost from his past.
Find out about upcoming shows, special events, and discounts.