I wholeheartedly agree with Simon's comments on this program. It was on regularly on my former cable system about 15 years ago, and I taped about 10+ just to have. They ended up getting passed around and around, the interest and enjoyment level was just too interesting to keep to one's self, don't you know. I think the episode "The Secret Life of the Fax Machine" was the one I've personally used the most to people who for some reason ponder in front of me about how they work. That's when I whip out of my memory the description of how Tim and Rex, using signal flags at a distance are able to communicate letters from the alphabet onto a large piece of paper. This helped me understand how rotogravure and wire-photos are done. Thanks Simon for the p2p tip on finding other favorite missing episodes from my little library. I shall CIO (Check It Out) that source. Tim Hunkin appeared at some sort of science fair at the Palace of Fine Arts in S.F. some time in the 1990's and demonstrated his thoroughly manual copier technique. I had always thought that it was one of the most effective explanations in the series, and I gathered from that Tim did too.