By Michael Slezak
November 18, 2008 at 04:00 PM EST

“Donna Noble has left the library. Donna Noble has been saved.” —Donna Noble (Catherine Tate), Doctor Who. (Yeah, I know we already had a Doctor Who quote earlier this month, but with Season 4 out on DVD today, I couldn’t resist paying tribute to the best my favorite companion in series history. So jump ahead to the 2:45 mark and catch the most chilling sound bite from the classic “Silence in the Library” episode.)