*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.
Jack: Who has a sonic screwdriver? The Doctor: I do! Jack: Who looks at a screwdriver and thinks, "Ooh, this could be a little more sonic. The Doctor: What, you've never been bored? Never had a long night? Never had a lot of cabinets to put up?