3. The Christmas Invasion "Big Threatening Red Button"
"I DON'T KNOW! I mean, I know I'm the Doctor, but beyond that, I-I just don't know. I literally do not know who I am. So I'm testing. Am I funny? Am I sarcastic? Sexy? I mean, judging by the evidence I've certainly got a gob! And how am I gonna react when I see this? A great, big, threatening button. A great, big, threatening button which must not be pressed under any circumstances, am I right?...Which leaves us with a great, big, stinkin' problem: I really don't know who I am. I don't know when to stop. So if I see a great, big, threatening button which should never ever ever be pressed, then I just want to do this."
This is the speech that mad Tennant "the Doctor" for millions. It made him my Doctor. It's not a speech with hidden depths, like a lot of the ones I've talked about before. It's got more giggles than tears. Its audience isn't a god, or a devil, but casual invaders. What it is, is the Tenth Doctor. One of the Great Doctors perhaps the greatest. He's mad, he talks like he's nuts, and he can't not press a button. Because no Doctor has ever existed who could resist a great big threatening button, and Tennant's gloriously freewheeling performanc ehere makes that wonderfully apparent.