Entitled The God Complex, it’s written by Being Human creator Toby Whithouse. It’s up there with the quality of his first and best Who story, School Reunion, too, although I suspect that the praise for this one might not as unanimous as that enjoyed by The Girl Who Waited last weekend. Personally, I thought that The God Complex was excellent, though. Corridors have, of course, long been a staple of Doctor Who, and here, they’re used to really quite spooky effect at times. In fact, the whole episode might just be the creepiest of the series to date, skilfully tapping into a series of primal fears, and building the tension very well as it goes. Whithouse’s script has more on its mind, though, as he explores religion and just what the Doctor is doing flying around the universe. It does this while throwing in a line from The Apprentice, too, as well as tipping its hat to Star Trek once more. Guest star of the week is David Walliams, and he’s thoroughly restrained, putting in a believable and important performance. He’s outshone by Amara Karan, though, who puts in sterling work here in another of the supporting roles. Furthermore, the episode has some interesting lines and themes that are best left discussed once the credits have rolled on Saturday night. We’ll have to leave that until then. Will The God Complex be to everyone’s liking? I’m pretty sure it won’t. But it’s a stylish, wonderfully realised and pretty much self-contained story, that leaves things in an interesting place for the week after.