Concerning The Doctor Himself...
He's 900 years old (or is he a thousand?). He's had eleven faces (or are we counting John Hurt?). Aside from that, we don't really know that much about the Doctor. Well, wonder no more. Well, wonder a bit: it would be boring to give everything away, wouldn't it? 99. He actually is a Doctor. Well he thinks so. "Yes, I think I was once, Polly," he claims in The Moonbase, "I think I took a degree once in Glasgow. 1888 I think." 98. Only once has the Doctor been referred to as "Doctor Who" within the show, in The War Machines. 97. Creator Sydney Newman suggested to the BBC in the 1980s that they should hire a woman to play the titular character to boost ratings. 96. Aspirin is poisonous to Time Lords. 95. The Doctor's longest-standing companion was the Second Doctor's Scottish friend, Jamie McCrimmon.
94. Despite being an alien with a British accent, the first time the Doctor was recognised as British, within the show, was in the TV movie. In the next televised story, 'Rose', Rose identified the Doctor as being northern. 93. Russell T Davies nearly explained the "half-human" comment in the TV Movie in 'The End of Time' but didn't want to confuse viewers only familiar with 'Human Nature'. 92. Steven Moffat has written for five Doctors: the Ninth, Tenth and Eleventh obviously, but also, the Fifth ('Time Crash') and most recently the Eighth ('The Night of the Doctor'). He also wrote a prose story about the Seventh Doctor, entitled 'Continuity Errors'. 91. The Doctor claims to have lived in a house halfway up a mountain, when he was younger (The Time Monster).