What is your all time favorite episode of "Empty Nest" and why?

Just one? Geez, I don't think I could pick just one.
I haven't even seen a third of them, but a few of the favorites I have picked are:

"The Unimportance Of Being Charley": We get to meet Charley's (very funny) parents and Charley may just be my favorite character, and this episode circulates around him. Not to mention, this was the episode with the classic, priceless Harry Weston retort to Laverne when his college basketball time wins: "In your FACE, Laverne! In your FACE! In--your--"
"Doctor!!"
"Sorry...FACE!!" Definitely an A episode.

"A Christmas Story": The holiday episode that brings out the most appealing Empty Nest element--its heartwarming quality. Carol and Barbara worry about Harry running away (to Vermont) from his fear of Christmas he has had ever since losing his wife, who made Christmas so special. Dreyfuss is the only one who has the guts to teach Harry a lesson--he runs away, and with the trip cancelled, Christmas is no fun at all. But Dreyfuss arrives back just in time for Harry to realize his dog has just done what Harry's been doing for years--running away at Christmas. And everyone's finally able to celebrate. A+.

My favorite episode is "Aunt Marhta Returns" because Park Overall and Marsha Warfield get pies in the face.