Celebrating the 50th anniversary year of Doctor Who, this Sourcebook explores the Third Doctor’s adventures on Earth and beyond. With detailed information on all the allies, enemies, aliens and gadgets that he encounters, as well as examining each of his adventures, the book contains a wealth of material for the Doctor Who: Adventures in Time and Space RPG, and is also a fact-packed resource for fans of the show! Exiled to Earth and prevented from travelling in time, the Doctor became UNIT’s scientific adviser and defended Earth against all manner of sinister threats! Face the plastic horror of the Autons, stop hordes of alien spiders and thwart the machinations of dangerous conspiracies! We’re running out of time, so quick - reverse the polarity of the neutron flow! And above all, beware the Doctor’s ultimate nemesis - beware the Master!