50th Anniversary Special (Story Code 7.13) by Steven Moffat

The Doctor and his previous incarnation are caught up in an epic adventure with his old foes, the Zygons and the Daleks. Meanwhile, the Doctor's past has returned to haunt him - who is the Secret Doctor...?

Matt Smith (The Doctor), Jenna Coleman (Clara), David Tennant (The Doctor), John Hurt (The Doctor), Billie Piper (Rose Tyler), Jemma Redgrave (Kate Stewart), Joanna Page, REST OF GUEST CAST TBC

Directed by Nick Haurran
Produced by Marcus Wilson
Executive Producers Steven Moffat and Faith Penhale
A BBC Wales production

TX (BBC 1 & BBC 1 HD):
23rd November 2013

Notes:
*Featuring the Eleventh Doctor and Clara, the Tenth Doctor and Rose, and the Secret Doctor

*This was the first 'Doctor who' episode to be shown in 3D since 'Dimensions in Time'

*To prevent any spoilers and plot leaks, this story was broadcast around the world at the same time, making it the world's biggest drama simulcast; because of the time differences around the world, its evening transmission in the UK on Saturday 23rd November meant that it was shown earlier the same day in North America and early on Sunday 24th November in Australia and New Zealand