It's been a year since Philippa "Flip" Jackson found herself transported by Tube train to battle robot mosquitoes on a bizarre alien planet in the company of a Time Lord known only as "the Doctor".

Lightning never strikes twice, they say. Only now there's a flying saucer whooshing over the top of the night bus taking her home. Inside: the Doctor, with another extraterrestrial menace on his tail — the Daleks, and their twisted creator Davros!

But while Flip and the fugitive Doctor struggle to beat back the Daleks' incursion into 21st century London, Davros's real plan is taking shape nearly 200 years in the past, on the other side of the English Channel. At the battle of Waterloo...