I have to admit i wanted Linae's return to be epic and dark and evil and nasty and vile but nope, we got this instead. Which as it turns out this is a very good episode.
The SG team arrives on a planet to find that everyone has had their memories erased and save for two people nobody has a clue to anything. The SG team works with these two victims to find out what happened and how to cure it. In the end they find that Linae is responsible for this disaster and she even shows symptoms of repeating her past atrocities if the team can't find a way to stop her while returning everyone to the former selves.