Madman's R4 release of BW Season 3 on dvd came out recently and I've been flicking through some of the excellent extras. It's mentioned in a FAQ section what the real story behind the mysterious "Dark Glass" episode is. The rumour that I had heard flying around the net is that the episode was blocked by Hasbro or Mainframe for being too violent/mature/dark and replaced with "Go With the Flow." According to our good pal Larry, what actually happened was the script was written as a season 2 episode, but it was not up to the usual standard. So the story editors trashed it and replaced it with "Transmutate." Ta-da, mystery over.