Relive the golden era of Doctor Who with this definitive Third Doctor Sourcebook, celebrating five decades of Time Lord adventures. This meticulously researched guide profiles every ally, adversary, and extraterrestrial threat the exiled Doctor faced while serving as UNIT's scientific adviser on Earth. Confront the chilling Autons, battle alien spider hordes, and unravel sinister conspiracies threatening humanity's survival. Packed with detailed adventure breakdowns and comprehensive equipment specifications, this sourcebook serves dual purposes: an indispensable resource for Doctor Who: Adventures in Time and Space RPG campaigns and an authoritative reference for devoted fans. Whether you're crafting new stories or exploring classic encounters, this volume captures the essence of the Third Doctor's era with authenticity and depth that brings Pertwee's legendary tenure to vivid life.