Okay, I remember now - cheers!
[edit]
Probably a stupid question, but is this different from the Alien Evolution doc on disc 9 of the Quadrilogy set? Is it a longer version or something? I know the version of the Kermode Exorcist doc on the UK Exorcist disc is a shorter version than was broadcast (the R1 disc has the full length version) - is this what happened here?
Cheers!