I captured a 3-hour Waterworld broadcast on WGN last night. I figured it would be the same 3-hour cut that Bravo and USA aired, but I'm pleasantly surprised! It has a fair amount of footage from the 4-hour Sci-Fi cut mixed in--I haven't begun to scratch the surface, so I don't have all the details yet. The interesting thing is that the framing is slightly zoomed, and panned down significantly, which means it's a totally different telecine from the other cuts. I wonder, with all these extended versions, each with different framing, there must be a 35mm master print somewhere. My guess is they're transfering the full extended version to tape, then cutting it down, not making an extended version on video.