DCS Patricia Carmichael

Patricia Carmichael arrives as an outside investigator brought in to scrutinise AC-12 itself, sitting across the interview table with a folder of hard questions and no patience for evasion. She is precise, unsmiling, and utterly unmoved by rank or reputation, treating every answer as a potential lie worth pulling apart.

Anna Maxwell Martin plays her with a stillness that makes every pause feel like a trap closing. The writing gives Carmichael no warmth to spare and no need for it — she is pure procedural pressure, and the fun is watching characters who usually do the interrogating suddenly squirm under someone colder than they are.