Of course, when talking about Elizabeth Taylor as a member of the League of Themselves in Toobworld, the prime example has to be her appearance with then-husband Richard Burton (and that giant rock she wore on her finger) in the season premiere episode of 'Here's Lucy' in 1970.
And thanks to my tele-blogging friends at "The Flaming Nose"* who tracked it down at YouTube, here's the full episode!
* You'll find "The Flaming Nose" listed in my links to the left. And what better place to find Lucy TV material like this? (But they're so much more!)