30 Days of Doctor Who: Question 22: Something silly.
I'm not sure whether this is silly: maybe it's just my enjoyment of it that is silly. I love, absolutely love, the moment when Jackie Tyler slaps the Doctor in "Aliens of London".
The dialogue:
The Doctor: Actually, it's my fault. I sort of, uh, employed Rose as my companion.
Policeman: When you say "companion," is this a sexual relationship?
Rose Tyler, The Doctor: [they look at each other, and then they simultaneously say] No!
Jackie Tyler: [getting in the Doctor's face, rather threateningly] Then what is it? Because *you*, you waltz in here all charm and smiles, and the next thing I know she vanishes off the face of the earth! How old are you then? 40? 45? What, did you find her on the Internet? Did you go online and pretend you're *a doctor*?
The Doctor: I *am* a doctor!
Jackie Tyler: Prove it! Stitch this, mate!
WHOP.
I also like his indignation afterwards: "Nine hundred years of time and space, and I've never been slapped by someone's mother."