Anna Maxwell Martin makes a strong impression in limited screen time, with reviewers calling her performance a breakout and describing the MI5 character as blunt, threatening, and unintentionally funny.
Pros: suspense, entertainment value
Cons: season pacing, episode pacing
Martin is generally seen as warm and capable in the recast role, though one critic found her merely adequate and missed Olivia Colman’s established chemistry.
Pros: ending satisfaction, cultural representation
Cons: supporting cast performance, pacing