I highly recommend that you watch SG1 and Atlantis Fresnelly. SG1 may have started in 1997 or so but it's still relevant and enjoyable unlike some other shows from the time period that I've been watching.
The Freaky Friday stones switch your conscious with someone connected to the matching stone. Not only did Rush enter that guy, That guy entered Dr. Rush. For all we know, He could still be the guy he switched with. I doubt it though, he seemed awfully normal. I'm not sure what he really did or was said while he was switched. I want to believe him but I think it's going to take someone else using the stone to confirm it. I really dislike the whole power struggle thing. I hated it when they did it in SG1 and Atlantis and it's not any better in Universe. I was surprised with the Senator. He really didn't seem like the kind of person to do that. I was expecting to absolutely hate him for the rest of the season.
There really wasn't a lot to judge the show on in my opinion. I expected that it would take a few episodes to get introduced to everyone and actually start liking people. I'm actually glad Eli isn't seen as the genius loser like early Daniel and Rodney were. It's cool that he and Lt. Scot seem to get along.
I hope they introduce a bad guy soon.