The hat settled on top of the Doctor's holographic matrix and was disappointed to find that it still couldn't read him.

"Which house do you choose?"

"I don't know," the Doctor said thoughtfully. "Gryffindor is for the brave, and I think I like that…but since Mr. Paris got sorted there fairly quickly it may also be for the rash and I'd have to keep patching up my housemates. So not Gryffindor. Slytherin doesn't look friendly, and none of my crewmates are there either, so not Slytherin. Hufflepuffs are loyal and kind…I am a doctor, with a good bedside manner. Ravenclaw is for the intelligent, and since I began my life as a walking database I suppose I'd fit in. And Seven's in that house. Yes, I think I've made my choice.

The Doctor whispered it to the hat, and the hat shouted "RAVENCLAW!"