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Pictures: Doctor Who official 50th celebration in London
23 November 2013
Last updated at 12:27 GMT
Thousands of Doctor Who fans are at a special three-day event in London to celebrate the show's 50th anniversary.
Thousands of Doctor Who fans are at a special three-day event in London to celebrate the show's 50th anniversary, from Friday to Sunday.
The first ever Doctor Who episode, An Unearthly Child, was shown on TV on 23 November 1963.
A special 50th anniversary episode, The Day of the Doctor, is being broadcast on Saturday night at 7:50pm on BBC One. It's also being shown around the world in more than 90 countries!
Fans at the event are coming face-to-face with some Doctor Who characters... There's also a special effects show and a chance to learn how to walk like a monster!
Former Doctors Peter Davison, Sylvester McCoy and Colin Baker take part in a question and answer session.
These guys are there too! Doctor Who boss Steven Moffat poses with Jenna Coleman and Matt Smith, who's leaving at the end of the year.
Monster masks from the past 50 years are on display.
This fan - dressed as the Tardis - poses with two Daleks.
And this brave boy has an even closer encounter with a Dalek!
But this fan goes one step further by coming dressed as a Dalek!
Can you guess which Doctor this fan has come as?