Throughout this third series of Torchwood, the familiar team members have turned in fantastic acting jobs, but the greatest props go to those playing the least sympathetic roles here: solid, estimable Susan Brown as the assistant to the central civil servant, who up till now has practically defined stiff upper lip, allowing her frosty exterior to crack at last; Nick Briggs and Deborah Finlay exhibiting equal parts ballsiness and shame as the Cabinet members most willing to say the unthinkable, eclipsing even Nicholas Farrell's oleaginous prime minister; and of course Peter Capaldi, as the aforementioned civil servant, whose habit, or instinct, or programming as "servant" leads him to betray civil principles.