Firstly, this story pretty much completely recontextualises the previous entries to The Stranger series, disconnecting the series from Doctor Who quite a bit. I don't really mind this, but it could bother some people. I found this mostely enjoyable to watch. I liked the directing, and the pacing felt good. However, it felt somewhat confusing with a lot of the sci-fi elements being somewhat poorly explained. This did serve to create a nice, mysterious, atmosphere, which I liked, but it also made things a little hard to follow. There's also not that much actual substance here, in my opinion. To end on a positive, I liked all of the acting.