First episode of series eight of the science fiction series about a time-travelling doctor. As Matt Smith regenerates into the latest Doctor, Peter Capaldi, Jenna-Louise Coleman returns as his straight-talking sidekick Clara Oswald. When the Doctor arrives in Victorian London he discovers that there is a dinosaur on the loose terrorising the city's inhabitants. Will Clara accept the new Doctor and join him in saving the people of London from this man-eating creature?