One of the things this episode always makes me think about is how BIG the SGC is in the background. By episode 4 SG-1 is chattering about an unseen mission where something else happened. By episode 6 some other team has embedded itself on another planet, gone rogue, and entirely altered the course of its inhabitants. Right from the start you get the sense we only see a tiny fraction of what goes on, although SG-1 as the flagship team tends to be/get involved in the really big Earth-impacting adventures.