Peter Capaldi begins his reign as Doctor Who in an adventure which sees him facing zombie robots and a huge dinosaur, all with the help of some familiar friends…

As a Tyrannosaurus Rex rampages through Victorian London, the city’s citizens watch amazed with horror. Then, to their disbelief, the giant dinosaur spits out a strange blue box!

It’s the TARDIS – from which a regenerated Doctor and Clara emerge to be greeted by shocked locals. Both look very worse for wear.

Taken in by the Doctor’s Victorian era pals – Madame Vastra, Strax and Jenny – the Doctor tries to get used to his much-older new look, but Clara has trouble getting her head around him being so different. She can’t even believe it’s the same person. Luckily, Madame Vastra helps her deal with the changes to her travelling companion…

There’s precious little time for Clara and the Doctor to become better acquainted, however, as events engulf them. Not only is there a dinosaur on the loose, people have been spontaneously combusting all around the city. Something sinister is causing it, and investigations lead the pair to a mysterious race of robotic creatures which have been rebuilding themselves with human parts.

This adventure also sees the shock return of a familiar face and the first appearance of guest star Michelle Gomez, who plays the Gatekeeper of the Nethersphere, a strange woman who appears throughout the series.