Even though I watched the last "supposed-to-be playthrough of the show" on Comet, some episodes were skipped, and it stopped doing that after they jumped from late season 8 to the start of season 10, so there are some episodes I missed.
1) What became of Apophis after episode #313: "The Devil You Know"? All spoilers are fine.
2) The snake zat guns-things: I know the first shot knocks someone out, a second shot kills them, and a third disintegrates them. How much time must pass, after getting shot and knocked out once, before getting shot again just knocks you out again? It's not like the zats have a memory of who they shot, or anything like that.