Post by River Song on May 13, 2012 18:23:02 GMT -5
Played By: Tom Baker
Companions : Sarah Jane Smith, Harry Sullivan, Leela, K-9, Romana, Adric, Nyssa, Tegan Jovanka
The Fourth Doctor was the fourth incarnation of the Time Lord known as the Doctor. He left all ties of his previous incarnation's exile behind on Earth, setting off to travel the cosmos. He initially travelled with Sarah Jane Smith and Harry Sullivan, but Harry chose to remain on Earth when the opportunity arose. The Doctor and Sarah continued on their adventures until the Doctor was summoned to Gallifrey, necessitating that he leave Sarah Jane behind as humans were not allowed on Gallifrey at that time.
After leaving Gallifrey, he met and travelled with Leela of the Sevateem. During his travels with Leela, the Doctor gained a new companion in the robot dog, K9. Returning once more to Gallifrey to stop an invasion, Leela and the original K9 stayed behind there. On the White Guardian's orders, the Doctor began looking for the Key to Time with fellow Time Lord Romana and K9 Mark II. Once that search was concluded, the Doctor and a newly-regenerated Romana went on the run from the Black Guardian. They accidentally passed into the smaller Universe of E-Space.
During his travels in E-Space, the Doctor gained a new companion in the young mathematical genius Adric. Romana and K9 stayed behind in E-Space as the Doctor and Adric departed for N-Space.
Once again encountering his old enemy the Master, the Doctor and Adric met a Traken girl named Nyssa. She would later join them, along with the human Tegan, to help him prevent the destruction of the Universe by entropy. While stopping the Master from using this threat to blackmail the Universe into servitude, the Doctor fell from the Pharos Project telescope and regenerated for the fourth time.
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