Hahaha the Doctor's face when he realizes Rose was talking about a cat. <---- what really cracks me up is that he's experimenting with back-combing!<----Also, the cat was ginger. Didn't he want to be ginger?
*Spoiler* If you haven't gotten that far in Doctor Who. But when I found out that he was The Face of Boe, I kind of figured it out before, but it was still a big surprise. The people of BBC really do know what they are doing.