Christian mentioned it to me some time ago, but I completely forgot to mention it in my blog. Totem was on Heroes, in the midst of all that KDE desktop.
You can see the very recognisable old-school window icon by Jimmac, as well as the distinctive menu entries. We don't have the nifty equaliser bits showing on the right implemented though.
(I actually thought it was an old version of GNOME with Sawfish/Sawmill the first time I saw this episode...)