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.