that cliffhanger ending – of Line of Duty episode four, it's safe to say that fans are on tenterhooks waiting for some resolutions. Those at the top (in this real-world instance, that's the Beeb) have obliged with a fairly huge announcement ahead of this Sunday's (April 18) fifth episode: namely, that a fan-favourite character is set to make a return. Detective Chief Superintendent Patricia Carmichael (played brilliantly by Anna Maxwell Martin) will once again be putting everyone around her in their place, when she sets foot back in the (AC-12?) building. BBC Ever since she told Hastings that "Maam would suffice" during a cutting interrogation interview, it's been clear that Carmichael is not fussed about making friends. But before we go any further into what her impact in season six might be, let's rewind for a moment and recap (because, in