The RadioTimes has published new information on the prequel to the anniversary episode, The Night of the Doctor, which will be accessible via the BBC Red Button feature before Saturday the 23rd.

Details are scarce but we’re told it will feature one of the three incarnations of the Time Lord – Matt Smith, David Tennant and John Hurt – set to star in the feature-length special. But which one?

See the full RadioTimes article for the exact dates and times.