War Doctor

The War Doctor (also known as John Hurt) is one of the incarnations of the Doctor. He makes his first appearance in the eighth episode of Season 3, where he saves the Eleventh, Tenth and Fourth Doctors from the clutches of the Zygons.

Personality
Full of doubt and self-loathing, the War Doctor not only thinks that he doesn't deserve to be called "The Doctor", but also any identity at all, leaving it up to others to choose how they want to address him. He shows extreme bouts of anger if anyone refers to him as "The Doctor". He often refers to himself as a "monster".

He can also be stern as indicated by his strong dislike for childish vocabulary, considering the fact that the Eleventh Doctor used such words to prove that he was ashamed of being a grown-up.

Due to his advanced age, the War Doctor is cagey and cranky, tired of the suffering and anarchy caused by the Time War, but still maintains a whimsical charm, addressing the TARDIS as "old girl" and laughing at the jokes he accidentally makes. He usually berates his fellow Doctors for using their Sonic Screwdrivers as weapons, though he sometimes finds himself wielding his screwdriver in a similar fashion.

He also displays a confident recklessness, sometimes considering politely asking his enemies to take him prisoner so he can infiltrate their strongholds, deciding his way with "eeny meeny miny, moe" and confidently walking out after asking his enemies to take him to their leader.

Unlike his other Doctors, the War Doctor endorses the use of weapons. However, he is known to enter battles unarmed and shows reluctance to have weapons aboard the TARDIS, owing to the fact that she doesn't like them.