In the Crimean War, the Doctor discovers the British army fighting a brutal alien army of Sontarans, as Yaz and Dan are thrown deeper into a battle for survival. What…

On Halloween, all across the universe, terrifying forces are stirring. The life of Dan Lewis is about to change forever. Why is the Doctor chasing Karvanista? What is the Flux?

The Cybermen are on the march. The last remaining humans are hunted down. Lies are exposed, truths are revealed, and for the Doctor nothing will ever be the same.

In the far future, the Doctor and her friends face a brutal battle across the farthest reaches of space to protect the last of the human race against the deadly…

The mysterious “Praxeus” will cause the quartet to split up (never a good idea) to investigate mysteries all over Earth. And what they find will threaten all human life (again).