You might think you need to know a lot about Doctor Who, given that it is a fifty-year-old show, to enjoy this story, but you don’t need to know much. The Doctor is an alien, a Time Lord, the last of his race, who travels through time and space in a blue box that is bigger on the inside than it is on the outside. It sometimes lands where he wanted to go. If there’s something wrong, he may well sort it out. He’s very clever.
