Afterimage, DS9 7
All said and done, they are integrating the character of Ezri Dax in well. Despite kinda negating what we know about Trill culture and their need to disassociate with the loved ones of their previous hosts (this is war after all. . . ) it works. (Although, now that the Symbiont is safely within Ezri, why not transplant to a trained host? Or would that kill Ezri? I think it might. Should probably check the BBS on that one.)
Anyway, I love me a nice Elim Garak episode, but I don’t like seeing him weak and with Daddy issues. His arc comes off a little forced in this one, I’m afraid. Though I do like his final collapse upon realizing that he is, indeed, a traitor to Cardassia despite wanting Cardassia to be strong.