Millions will tonight tune in for the highly anticipated 50th anniversary episode of Doctor Who - as three former time lords team up.
The Day of The Doctor stars Matt Smith, former Doctor David Tennant and John Hurt.
They will line up alongside Jenna Coleman and Billie Piper in the special broadcast, which will air tonight at 7.50pm on BBC One, and simultaneously in 93 other countries.
The episode will also be screened at hundreds cinemas in the UK, including 400 in 3D, and thousands more around the world. Vue cinemas said this will be the biggest ever one-off UK cinema screening.
There have been numerous commemorative events in the build up to the 50th anniversary of Doctor Who The British Film Institute has held monthly events throughout the year, celebrating all the different Doctors in the show’s history.
An Adventure in Space and Time was aired on BBC Two earlier this week, which retold the making of the first series of Doctor Who.
A three-day celebration to mark the 50th anniversary is under way at the ExCeL Centre in London, to which more than 20,000 Doctor Who enthusiasts are expected to flock.
Doctor Who was first broadcast on BBC One on 23 November 1963. It was created as an educational family show to fill the gap between the football results and evening entertainment programmes.
Now the series is watched by around 80 million people worldwide and has been honoured by the Guinness World Records as the longest running and most successful science-fiction series in the world.