I see Ben Wheatley directed the episode (with Rachel Talalay apparently directing one scene, the Missy one according to Wikipedia). He's one of those names I see a lot in the media, but I haven't actually watched much of his output beyond this and the next DW episode. I saw A Field in England and thought it was very trippy, and largely a waste of the seventeenth century costumes. But it also just wasn't my kind of film, to be fair to it.