In this animated feature, the Doctor and Martha follow a trail of clues across wild and wonderful alien worlds, to find the location of the legendary lost spaceship, the Infinite. They soon discover that they are not alone in their quest - the evil Baltazar (Anthony Stewart-Head) is also searching for the ancient starship, and wnats to use its powers in order to destroy Earth and rule the galaxy.
Buy Doctor Who: The Infinite Quest (DVD)