The 10th Doctor

Time Zone: December 25th, 2005 - Present
Played By: David Tennant

So far, the Tenth Doctor has displayed a light-hearted, easy-going, witty and somewhat cheeky manner, yet with a strong personal sense of justice that makes him quick to anger when he feels it is violated. He sent the Sycorax Leader (who was attacking him from behind) tumbling to his death while commenting "no second chances." He was equally unforgiving of Prime Minister Harriet Jones who had given the order to destroy the retreating Sycorax ship. The Doctor warned her that he could "bring down" her government with six words ("Don't you think she looks tired?", whispered to Jones' aide) and he did. He acknowledges that he is less merciful than he used to be.

The Tenth Doctor has a tendency to babble, mixing apparent nonsense with vital information, sometimes acting erratically to put his enemies off guard like some of his earlier incarnations. He can also be rude on occasion, and is not always aware of it. He has a tendency to use technobabble to describe scientific concepts before substituting it with a simpler, analogous explanation.