The climax of BBC's celebrations for the 50th anniversary of Doctor Who, The Day of the Doctor was an (almost) feature-length special of the successful sci-fi serial. The episode had two 'Doctors' team up: the outgoing Matt Smith (soon to be succeeded by Peter Capaldi) and his predecessor David Tennant. It also featured a once-off appearance by John Hurt as a 'forgotten' incarnation of the iconic character, as well as a cameo from Doctor Who No. 4 Tom Baker.

The show proved a ratings hit in the BBC, attracting an average of 10.2 million viewers to BBC One in the UK. That said, it didn't quite win Saturday's 'ratings war', with Strictly Come Dancing earning an average of 400,000 more viewers. It wasn't even the highest viewership for a Doctor Who episode since the show's 2005 revival, several of the seasonal specials having pulled in more viewers.

However, the TV ratings alone don't tell the full story of The Day of the Doctor. The episode was also broadcast in 3D in around 1,500 cinemas around the world, which many fans would have flocked to. The show's producers can also boast of breaking at least one world record, after making the record books for broadcasting the episode in 94 different countries at the same time.

It wasn't all celebrations, though. The episode was followed by a live show with the show's stars, writers and fans. Unfortunately, when One Direction participated in a satellite chat with host Zoe Ball, a significant delay between the two studios led to rather awkward results: