First Doctor

The First Doctor was an irascible, grandfatherly type, a brilliant but often short-tempered scientist. Perhaps due to his age, he seemed more frail than his later incarnations. He also appeared somewhat absent-minded, but this may have been exaggerated to make his enemies underestimate him. When Ian Chesterton and Barbara Wright first met him, he was staying on Earth to allow his granddaughter Susan to complete her education; he was also finding a hiding place for the Hand of Omega, although this fact was not obvious at the time. He often returned to Earth at various times in its history, apparently motivated by historical curiosity rather than a desire to preserve it against alien invaders. On his voyages to other planets, he was again motivated as much by curiosity as by a desire to help them. He apparently died of old age after his struggle with Cybermen, saying that "this old body is wearing a bit thin." But he was able to return to the TARDIS in time to begin his regeneration.