Fans have been speculating that Doctor's Who greatest nemesis will make a return to the show during its New Year special. And the BBC has finally confirmed during a teaser for the episode that the Daleks will be back with a vengeance, after show runner Chris Chibnall promised he wouldn't be using any 'old monsters'. In the new trailer which premiered on Christmas Day, Jodie Whittaker introduces the extraterrestrial race of mutants by saying 'this is the DNA of the most dangerous creature in the universe'.