A short film from the website FiveThirtyEight and ESPN about the second match between Kasparov and Deep Blue:
http://fivethirtyeight.com/features/the-man-vs-the-machine-fivethirtyeight-films-signals/
http://fivethirtyeight.com/features/the-man-vs-the-machine-fivethirtyeight-films-signals/