The Doctor is a 907 year old renegade Time Lord from the planet Gallifrey who, as a voluntary exile from his homeworld fought injustice where he found it. Alone among the Time Lords, he survived the Last Great Time War with the Daleks, though they returned shortly before his tenth regeneration. Throughout his life, he had a particular association and affinity with the planet Earth and its Humans. Thanks to his eternal heroics he is a well known and celebrated individual throughout time and space.

All a good Whovian needs to survive: Food, Rest and Doctor Who  ;-)