Season nine of long-running British spy thriller "MI-5" opens with Ros' (Hermione Norris) funeral, where Harry (Peter Firth) learns of a shocking betrayal at the highest level. Also this season, the agents go after Somali terrorist Hussein Abib (Peter Bankole), a scandalous secret from Lucas' (Richard Armitage) past is unveiled, and a growing bond develops between Ruth and Harry. Sophia Myles and Max Brown join the cast as agents Beth Bailey and Dimitri Levendis.
Season seven of British spy thriller "MI-5" opens with Adam Carter (Rupert Penry-Jones) valiantly battling to move a car bomb away from a densely packed memorial service. Meanwhile Harry secures the release of Lucas North (Richard Armitage), a MI-5 officer imprisoned in Russia for eight years. It's not long, however, before Ros begins to suspect Lucas' loyalties. The rest of the season deals with a top secret Cold War-era operation named Sugarhorse.
Carol Bolton (Sarah Smart) is feisty, passionate and reckless. Life has dealt her a raw deal. She lives in poverty-stricken Sparkhouse Farm with a drunken father, Richard (Alun Armstrong). Carol's determined to protect those closest to her - younger sister Lisa (Abigail James) and her soul mate since childhood, Andrew Lawton (Joseph McFadden).