I wonder if Peter's content would have been more if it had been the other version filmed? There were two versions of that ep -- one if the series had been renewed and one if it was canceled. I can see that the one for the very last ep would center almost exclusively around the core cast since it was a goodbye.
I covered my eyes! It made me all squirmy as those sorts of scenes always do [g] But it was very funny. And certainly memorable!