Wasn't it all? Aside from the scenes filmed in the quarry, of course. I love GT's story about the noise interrupting their filming one time turned out to be Doctor Who filming over the ridge - which you have, of course, heard, because like me, you have the DVDs and all the extras. *g*

Thank you for the explanation and yeah - personally I loathe season 4 but it does look a lot better than the Abba in Space earlier eps.

Which makes me think I need a Buddleia icon; most ubiquitous plant in the universe, every planet has one lurking somewhere.