Fans of Doctor Who, Torchwood and The Sarah Jane Adventures are being offered a once in a lifetime opportunity to go behind the scenes at the studios where the shows are filmed.
On Saturday and Sunday, November 8 and 9, the BBC will be opening the studio doors just outside Cardiff to 100 lucky competition winners and their friends and families. The money-can't-buy-experience is being run to help raise money for this year's BBC Children in Need appeal.
Doctor Who: Backstage will take fans to the heart of the action at the BBC Wales studios. Visitors will tour the closely-guarded sets, come face-to-face with some of the Doctor's mortal enemies, and meet the behind-the-scenes teams who make it all happen - including the set designers, costumiers and make-up artists.
To be in with a chance of winning a place on the tour, all people have to do is answer one multiple-choice question. The all-important question will be announced on Friday, September 26, live on the Chris Moyles Show on BBC Radio 1, between 6.30am and 10am. It will also be available here on the Doctor Who website - along with the full terms and conditions.
Entrants must be over 16. Each winner will be able to bring up to three guests, who must all be aged 5 or over. Entrants must be UK residents.
Sorry all ye Who lovers from across the seas