Visit video.google.com and do a search. Google is now using data streams of closed-captioning to index TV content on certain channels. Eventually they hope to index all television. It’s a great service.
In about 1989 Brandt Redd, genius programmer of Folio Corp. (at the time) figured out how to capture data streams from closed-captions and import them into a full-indexed Folio infobase. He demoed this to our team and we were all blown away.
But Google’s service is free, web-based, and includes image captures from the TV programs themselves.
Another service I’ve liked over the years is TVeyes.com — but I think Google’s service — especially when they tie Google News Alerts into the TV index they are building — will blow TVeyes.com away.