Maybe they weren't people.. :)
There were a few things in the TV show that I took note of:
1. Even Doug and Dave admit that they got the idea of hoaxing crop circles from a still unxplained crop circle found in Australia.
2. There was more real-time video footage of the strange glowing "lights" that seem to accompany some crop circles.
3. As far as the mathematical relationship to the circles goes, one researcher claimed that a NEW Euclidean? theorem had been derived from the crop circles (I'm no expert on mathematics, so someone else would have to confirm this).
4. The researchers also claimed a relationship between the crop circles and music.
5. Researchers claimed that there was a relationship between Stonehenge and crop circles. I think what they were getting at in that case was that maybe whoever built Stonehenge and similar circular rock formations did so in commemoration of crop circles that they had seen.
Overall the show was interesting and thanks again to discostu for posting the airdate and channel of the program.