When a dinosaur materialises alongside the Houses of Parliament in Victorian London, the Doctor';s old friends the Paternoster Gang are relieved when he arrives, seemingly to deal with the creature. However, time is against him as he must embrace his latest form in order to conquer a sinister threat lurking in the background of events.
Despite the emo-ness of the Doctor's revelation, this episode still had just the right amount of funny dialogue to balance it out, and we even see the Doctor make a joke!