Quite clearly spotted some UNIX/Linux desktops on various workstations, around 12 minutes into this program on BBC Four. It's a very interesting series actually, well worth
watching. It looks like either old KDE desktop or maybe XFCE, it's hard to tell, any ideas readers?
Update: Looks like it's actually a
CDE desktop, as Red Hat was the only distro to come with CDE a long time ago, before settling on Gnome, so it is most likely running on
Solaris,
as seen here. Thanks to Myles for recognizing CDE!
Screenshots:


Synopsis of this episode from tvguide.co.uk"The Biotech Revolution: Professor Michio Kaku looks at the revolution in biotechnology. Advances promise unprecedented health benefits and increased lifespans, but raise the spectre of uncontrolled human genetic engineering and the possibility of a world divided by genetic apartheid."