We join the Doctor, Amy and Rory as they crash through time, quite literally, after an encounter with damaged robot.

What could be more Steven Moffat, than finding an artificial life form in the Thames, which has been there since the Victorian era, and it then saying: "Doctor"?

That's how George Mann's Paradox Lost begins, and he tells us about how this book really helped to kick off his writing career, which has taken him to do more Doctor Who with BBC Books, Titan, Big Finish - and Star Wars!

George has a new book in the Star Wars: High Republic series, Tears of the Nameless, released on 24 September this year - we recommend you give it a read!