The Doctor is an alien, one of the powerful Time Lords from the planet Gallifrey. He is an intrepid traveler in time and space, armed only with his incredible intelligence and his fix-anything sonic screwdriver. As a Time Lord, his body also has the ability to regenerate if he is fatally wounded, becoming a new man each time. The Fourth Doctor masked his brilliant and inventive mind behind a facade of bohemian eccentricity. The longest lived incarnation of the Doctor so far, he was finally forced to change his body after losing a fight with his old enemy, The Master, and falling from a radio telescope to the ground beneath him. Ages 14 and up.