Tour of the Doctor Who sets
Children in Need Competition - Win a tour backstage at the Doctor Who Studios
This autumn BBC Children in Need is offering you a fantastic prize. The BBC will take you and up to three friends or members of your family backstage at the BBC Wales studios near Cardiff on November 8th or 9th.
It's the home of Doctor Who, Torchwood and the Sarah Jane Adventures. You'll see what goes on behind the scenes and how the BBC brings all those other worlds to life, meeting set designers, costumiers, make-up artists and monster makers Millennium FX. You can watch the Ood video above right to give you a flavour of what goes on backstage.
To enter the competition, you must be aged 16 or over, and answer this single question:
In the episode The Stolen Earth where in space did the Daleks hide 27 planets?
A) The Horsehead Nebula
B) The Omega Spiral
C) The Medusa Cascade
The number to call with the correct answer is 09013 26 77 88.
Calls cost 75p from a BT landline. Calls from other operators may vary and will be considerably higher from mobiles. 52p per phone call will go to BBC Children in Need. The competition closes at midnight on 6th October and you must get the bill payer's permission to call.
All 100 winners can each bring up to 3 friends or members of their family. All visitors must be aged 5 years or over (groups containing children aged 15 years and under must include an adult). All applicants must be UK residents.
The tours will take place during a break in filming, when the shows' casts are taking a well-earned break away from the studios. Cast members, including David Tennant, will not be present during the tour days