The eighth season of the British spy series quotMI5,quot which follows secret agents as they foil evil plots around the globe, begins with the fallout from Harry#39s kidnapping by the Russians A mysterious organization known only as quotNightingalequot is the ongoing focus of the eight episodes And Lucas#39 relationship with CIA agent Sarah Caulfied Genevieve O#39Reilly, reignites concerns over his loyalty This season also sees the exit of one of the few original cast members, Malcolm WynnJones
