Clara is alone in Victorian London with a man she doesn’t know, a dinosaur in the Thames, and a spate of deadly spontaneous combustions. The Doctor has changed. It’s time you knew him.
The Doctor's greatest secret is discovered.
Sontaran warriors set their sights on the Earth and its inhabitants.
Bodies with waxy, glowing, red skin are found in Victorian Yorkshire.
As poison gas suffocates the Earth's population, the Doctor and UNIT team members work to eliminate the threat.