Yeah, they have all kind of heavy-hitting concepts in this episode. I always love Sisko's arc through this episode. Just so emotionally devastated, gives a great backdrop for his character.

"I don't know if you can understand. I see her like this, every time I close my eyes. In the darkness, in the blink of an eye, I see her... like this."

So much great stuff is set up... this series is just so good, remembering how it all ties together.

And no. It's not linear. ;)