This was a fasinating episode that finally answered that question burning in all viewers minds: So what did Kate do?
While it is fairly fast paced in flashbacks, the episode moves rather slowly on the island. What makes this episode however, is the near perfect moment when Jack and Kate finally kiss. However instead of realizing that they are in love, the kiss seems to pull them apart. A friction develops between them not resolved until much later. The rest of the episode puts together some pieces about the stange orientation video and raises question about the button. We leave the episode almost bittersweet about Kate, but at least now we understand more of who she really is.