Fifty years after its only UK broadcast, one of Doctor Who's most celebrated, lost adventures is regenerated, with a brand new hand-drawn, black and white animation, synchronised with a digitally remastered recording of the original 1966 audio. After his first regeneration, the Time Lord and his companions, Polly and Ben, do battle with an old foe on the mysterious planet Vulcan. Can Polly and Ben cope with the new Doctor? How will the Doctor take to his new body? And will they ever overcome the power of the Daleks?