I haven't watched DS9 since it originally aired. A lot of the plots I don't fully remember, because it was so long ago. And I missed more than a few episodes, because I used to live in the middle of nowhere where TV reception sucked.
So I wasn't sure if I had already seen In The Pale Moonlight until Sisko gave the Romulan the data rod and said "All I could do was wait." Then "It's a faaaaaake." popped into my head.
I didn't remember a single thing about the episode but that line.
Toward the beginning of the ep, I was worried the big moral dilema was going to be that the data rod ruse worked, which would have been really lame. Yeah, it's wrong to lie, but that kind of thing wouldn't be worth all the gravity Sisko was bringing to the situation.
I was impressed at the end that the dilema turned out to more than weighty enough to warrant Sisko's guilt dump.