Several months ago I promised someone I'd get this footage uploaded somewhere. It's taken me so long that she may not even be in the fandom any more *hangs head in shame*. It's still a good interview though, and still worth making available. I'll probably cross-post this to
mark_harrison because I think that's where I made my original promise.
It's Mike Douglas interviewing Mark and Harrison with Carrie as the previous guest (and still present). From July 1977. It's about 7 minutes long.
I might put it on YouTube as well, if I can get off my lazy ass and get an account set up there. In the meantime, for anyone interested, there's a small version
here (8.5 MB), and a large version
here (just under 70 MB).
Warning - the quality is pretty poor. This came from an old NTSC video which was fuzzy to begin with. I converted it digitally to PAL when I captured it, but the footage was horribly interlaced. I've had to de-interlace it, which is why it's a bit jerky in parts but I haven't been able to get rid of that. The sound isn't very good either, especially on the small version. In other words, I suck at video conversion :D