Which do you think is the saddest episode of Cheers?

The finale was sad as hell. And "No Help Wanted". Both the saddest eps to me. but as the Cure Says, "Boys Don't Cry".:)

the final one

I do, Adieu which is the episode that diane leaves is by far the saddest episode of Cheers! I cried soooooo much especially on that last scene when Sam and Diane are an old couple and they are dancing in their living room! i was on the floor sobbing and bawling! Omg! it was soooo sad! that's why i don't like the One for the road part 3 the way the disregard that relationship upsets me! i mean it wasn't a "fling" type of thing it was true love!

id have to agree with you guys, definitly the series finale ONE FOR THE ROAD PART 3
more sad ones are
I DO, ADIEU (the one where diane leaves),
NO HELP WANTED
BIRTH, DEATH, LOVE, AND RICE (the one where we find out coach has passed away)

The saddest episode for me is when Lilith is cheating on Frasier and she leaves. AWH it just breaks my heart and makes me wanna cry every time I see it.

I do, Adieu was probably the saddest ep for me.

I do, Adieu and One for the road:(

Teaching with the Enemy and The Girl In the Plastic Bubble

I Do, Adieu made me bawl like a baby...the last scene where it shows them dancing together, what a great ending, even though I didn't want Diane to leave, they couldn't have given her a better send-off IMHO
It also made me hope that someday, through everything that happened in both of their lives, that Sam and Diane would ultimately be together.