The 10 Grand Charity Challenge has an online auction of some fabulous Doctor Who/TARDIS drawings done by an array of celebs like Michael Gambon, Colin Baker, Kai Owen, and Burn himself. There are 127 signed drawings up for bid (auction ends tomorrow). All proceeds go to support 3 fantastic charities: Cancer Research UK, The Prostate Cancer Charity & Great Ormond Street Hospital. Go take a look at whats available and maybe help out some really deserving charities.