Today is The Day of the Doctor

So, my fellow Whovians, today is the day: the airing of the 50th anniversary episode of Doctor Who, "The Day of the Doctor". It's playing on the BBC, of course, but also on BBC America at 19:50 UTC (2:50 p.m. EST), so us poor colonists can watch it as well. First, did you see yesterday's Google Doodle? Slate has more info on it at Brow Beat. Next, the BBC has been running related programming all week. One of those shows is "The Science of Doctor Who", with my old friend Professor Brian Cox (it p...