I had no idea what to expect from this one. I'd heard mixed reviews beforehand, especially about it being a highly derivative film, and I've previously disliked Barry Keoghan when I've seen him in movies. However, I can report that I was blown away by this glorious slow-burning thriller and that Keoghan in particular wowed me in a way I haven't been wowed in a long time. It starts off deceptively simple, depicting life at Oxford in a realistic and engrossing way, before moving to a country house where the story gets really interesting. Part horror, part mystery, deeply psychological and beautifully shot, this is one of those films which just keeps getting better and better.