Most underrated guest star? I love the Treehouse Of Horror with Lucy Lawless. So many great lines from her (and Comic Book Guy).
"Must... remove... my breast plate!"
(All of the convention-goers begin snapping pictures)
"Maybe later."
Her deception to get Comic Book Guy's guard down:
"Xena... needs... xex."
And I love the joke at the end:
"Wait a minute, Xena can't fly!"
"I told you, I'm not Xena. I'm Lucy Lawless."
"Oh."
https://youtu.be/MAYo3GTwU0k