This one may be their best celebrity guest of all, to appear on a game show -- albeit an adult, erudite one. It's Eleanor Roosevelt. She doesn't do a whole lot -- her voice is too familiar, and she's not actress enough to carry off a fake one at length. But it's Eleanor freaking Roosevelt, and just seeing her there is enough for me. Besides, later on, she does participate more.
My favorite moment may be at the very end when she goes to greet the panelists -- and you can see that she brought her purse with her!