The first doctor was Imhotep (from Egypt). He was the chief minister of King Djoser in the third millennium BC. C. and was considered the Egyptian god of medicine.
After encouraging Barbara and Ian to enjoy a performance of Shakespeare's plays at the Theater, the Doctor took Vicki to the court of King James I, disguised as a priest of York, with Vicki as his young male pupil. In the end, when Alexander was poisoned and began to weaken, the Doctor offered to keep him alive through a rudimentary artificial lung. The TARDIS landed in Destiny, where the Doctor met the Master for the first time since leaving Gallifrey. They were captured again, but the Xeron rebelled and released them, preventing the future the Doctor had seen.
After surviving an interrogation by the truth machine, the Doctor and his grandchildren managed to send a call for help to other ships. The Doctor was rescued by John and Gillian, and destroyed the Galvinium X machine, freeing the Menoptra slaves and defeating the Skirkons. While it remained there, the ship was attacked and the infirmary was isolated from the rest of the ship, trapping inside the Doctor and a young doctor, Olivan. After being ambushed by Zarbi, the Doctor was held hostage and discovered that the Skirkons aliens were posing as Zarbi and using Galvinium X, the rarest mineral in the universe, to build bombs that devoured him.
He is said to have graduated in Music and Performing Arts at the Academy, even starred in an Academy performance of The Army Game, and that he currently uses the alias Doctor Wat Who in Gallifrey; other past and future aliases of the Doctor are mentioned such as Doctor Spock, Mister Mann and Terry McNation. After landing in Germany in the 16th century, the Doctor and Susan partnered with Magistrate Rudolf von Slesinger and an inquisitor, Johann Eck, to protect Martin Luther from two murderers before his trial. However, before Napoleon arrived, the Doctor was attacked by a thief in ways that took his form, but caused the thief to fall by convincing him that Napoleon was going to win and tricked him into taking the form of Napoleon. The Doctor was horrified that the Earth was making holes in the universe for navigation purposes, but they ended up being dangers to navigation.
The Doctor helped scientists create a force field to repel Rocket Men's weaponry and managed to communicate with lightning, persuading them to attack the Rocket Men. When Susan pulled a Golithan Spiny Beetle from the console, the Doctor was convinced that he had repaired the TARDIS and made another attempt to return Ian and Barbara to their time only to finish in 1601.Steven sent the Doctor back to his body on Earth to return to the TARDIS, sending the copy along with the Doctor to improve his chances of surviving the trip. Because he had to save Steven from his serious injuries, the Doctor didn't have time to deal with the Conduit.