Doctor Who: The Beast Below

"The Beast Below" is the second episode of season five of the 2005 British science fiction/action revival series Doctor Who. It is the fifty-seventh episode of the series overall and the 752nd episode of all Doctor Who episodes combined. It was directed by Andrew Gunn with a script written by Steven Moffat. It premiered on Saturday, April 10th, 2010 in the United States on Syfy and BBC America.