Doctor Who will be contributing again to Children in Need and this year they are releasing a trailer and a special prequel for the Christmas Special. Children in Need is November 16th and read the press release for more info.
"Doctor Who featuring Matt Smith will also bring viewers an extra special ‘prequel’ to its Christmas special, with a bespoke storyline made for BBC Children in Need, including a world exclusive of the Doctor’s new companion. There will also be exclusive previews from the Doctor Who and Call the Midwife Christmas specials."
Children in Need night is on Friday 16th November 2012. Check out their website to find out about donating and how your money helps children all over the world - http://www.bbc.co.uk/programmes/b008dk4b