Yes, great episode. I get excited thinking that for many shows, season 3 is quite often the first "great" season of the show's run. This takes on special meaning when you consider how great the last half of season 1 of AoS was, and all of season 2.
Lain De Caesteker performances. I think, have been second only to Kyle McLaughlan's, which automatically makes him best among the regular cast.
Agree with Christopjer that we are going to find out what scars Jemma may have developed on the inside from her ordeal. Does seem that it may have drawn her closer to Fitzy, though (for now, at least). What about those guys who were previously sent to the planet? Might some of them still be alive, trying to get back home? Who or what was she running away from?
Love Peter McNichols' as Randolph. I wonder if he returned to Asgard, would he be able to drop the "human" accent and go back to that stilted Asgardian-speak. Also, I'm sure that the reason Heimdall can't see him has been covered/discussed, but I just don't remember.