This was... hardly the best episode I have seen. It was good in some part - the excitement, the unknowing what is happening and the difference between reality and nightmares, but.. i did not liked that this episode relied on SG-1 knowing. They have now the change that there is people who has ten years of history of gate traveling, but as this far this show have managed to continue on it's own - with that threat, that they are not independent - they will ruin a lot.
All the episode, the nightmares - the first part was exciting before we knew what was happening. To figure out why they see those dreams, but the end, when it was just getting read of it - not too catching.