Doctor Who 50th Anniversary Special Trailer
Extended promo teases meeting of Doctors and Dalek attack...
A second trailer has been released for the forthcomingDoctor Who 50th anniversary special episode.
Matt Smith, Jenna Coleman, David Tennant, Billie Piper and John Hurt all feature in the one minute and twenty second promo, which the BBC has shared on the web as well as screening on TV.
The action flits between alien worlds, the Tardis and London - and there are snippets of humour between the current Time Lord and his predecessor.
Daleks and Zygons will be included as the baddies in the 75-minute episode, which is set to be screened on 23 November in an historic global simulcast - with viewers in more than 75 countries able to watch the show at the same time.
Peter Capaldi is to take over the controls of the Tardis after this year's Christmas special.