Neil Marshall may have handed over directorial duties to film-editor-turned-film-maker Jon Harris, but he maintains a presence as executive producer on this horror sequel to his 2005 subterranean horror. And as sequels go it doesn’t get much more immediate; The Descent: Part 2 carries on directly where the first film left off. So we see lone survivor Sarah (Shauna Macdonald) emerge, bloody and terrified, from the cave system which claimed the lives of her potholing friends. Unfortunately for her, however, she is unable to explain what happened, and so is forced to return to the dark depths with the rescue team. It’s only when they see for themselves the terrifying, hideously deformed cannibalistic Crawlers who lurk therein that the officials realise exactly what they are dealing with – but by then, of course, it’s far too late.