In the mysterious world of the Nethersphere, plans have been drawn. Old friends and old enemies manoeuvre around The Doctor, and an impossible choice is looming over him.

With Cybermen on the streets of London, old friends unite against old enemies and the Doctor takes to the air in a startling new role. As the Doctor faces his greatest challenge, sacrifices must be made before the day is won.

Trapped in a world unlike any other he has seen, the Doctor faces the greatest challenge of his many lives. One final test. And he must face it alone.

If you took everything from him, betrayed him, trapped him, and broke both his hearts...how far might the Doctor go?

Friendship drives the Doctor into the rashest decision of his life. Trapped on a giant spaceship, caught in the event horizon of a black hole, he witnesses the death of someone he is pledged to protect. Is there any way he can redeem his mistake? Are events already out of control? For once, time is the Time Lord’s enemy.

“Without hope, without witness, without reward.” The Mondasian Cybermen are on the rise. It’s time for the Doctor’s final battle…

Two Doctors stranded in a forbidding snowscape, refusing to face regeneration. A British army captain, seemingly destined to die in the First World War but taken from the trenches to play his part in the Doctor's story. In the final chapter of the Twelfth Doctor's epic adventure, he must face his past to decide his future. Along the way he realises the resilience of humanity, discovering hope in his darkest frozen moment. It is the end of an era, but the Doctor's journey is only just beginning.