It could say that major storylines end with this episode and this episode is huge. Both Ba'al and Adria are out to get the rule over the galaxy and they are ready to do so many things and there are quite many shocks - killing all Ba'als.. then using Goa'uld to take over Adria (genial idea).
We have a lot of action, much things happening. Too many even maybe. Anyway, it is huge episode. And the storyline with Adria and Vala was very good - the way they finally started to realized that they are drifting apart and soon they will face each other.
And the ending.. the way Vala does feel for her daughter and what is happening hurts. And the ending... very good episode.