Much of Fortitude’s sense of dread comes from the town’s terrible isolation. The extremity of its position, and of its conditions, makes it difficult to get in and out. While no one is genuinely trapped, well, not explicitly anyway, none of the residents have the option of just slipping off whenever they feel like it. From a social point of view, this makes for some very interesting relationships. It’s hardly suprising, for example, that Natalie Yelburton should have suggested that people hop in and out of bed with one another, or that so many of the formal relationships should have proven to be so porous. With a small pool of people, certain feelings can develop and when there is little opportunity for escape, it’s no shock to find that spouses should seek a little respite elsewhere. All in all, it’s a pretty remote place. And yet, the late Professor Stoddart had a cocaine connection. The question of Liam’s guilt is an unresolved one. The blood and the fingernail place him at the scene of the crime, while the bizarre hyperbaric chamber-seance scene confirm that he was almost certainly involved at some level, but there is still something missing. The assembled investigators (in which group I include the police, Liam’s parents, Dr Allerdyce and Hildur) seemed to accept Liam’s woozy ‘confession’ a little too readily, even if they didn’t want to believe it. Their reaction and Dan’s clumsy apology to Frank suggested that they took it as an immediate admission of guilt, ignoring the more plausible possibility that Frank (still the chief suspect and possessed of the physical heft required to have done the deed) was guilty and had somehow involved his son in the crime. Convenient? Yes. A little too convenient? Sure. Deliberately convenient? I’d say so. Further troubling incongruities followed. The conversation between Morton and his colleague in London began as we’d perhaps expect it to, with the detective offering agonised attempts to reconcile the Liam question. Was it ‘a profound psychosis’, this ‘inhuman savagery from a ten year-old boy’? Maybe, maybe not, but they were certainly very quick to move on, dismissing the Liam conversation as little more than a necessary but functional agenda item that had to be got out of the way before they could get to the main item, which was the death of Billy Pettigrew. The manner of the switch was telling. It’s long been hinted that Morton isn’t really interested in Stoddart, except for where his death provides further clues to the earlier killing, but his attitude suggests that the disparity in his concern is bigger that we’d perhaps thought. If that’s the case, then Stoddart, whose death largely removed one of the cast’s biggest names from proceedings, would be the red herring to end them all. Other elements, including the bloodstained carpet, the obvious cover-up and the dread involvement of the frightening Mr. Lubimov, are rather more straightforward, but it still remains tantalisingly uncertain. Even the plausible explanations, such as that offered by Dan’s description of the mercy killing, are dismissed. Something deeper is at play here. Read Michael’s review of the previous episode, here Follow our Twitter feed for faster news and bad jokes right here. And be our Facebook chum here.