The tenth and final season of long-running British espionage thriller 'MI-5' sees Harry return to his post as head of Section D, wherein his Russian opposite Ilya Gavrik (Jonathan Hyde) proposes a strategic partnership between their countries. New 'spooks' Erin Watts (Lara Pulver) and Calum Reed (Geoffrey Streatfield) join the fight to prevent all enemies of the alliance from s..