with lost, there is absolutely SO much going on in any given episode, that a lot of the time it helps knowing certain things that are going on so that you can pay attention to other details. For example seeing people in the background and recognizing them as linked to the characters. Boone and Shannon's father in the medical room, Walt's face on the milk carton, the people in the orientation film, etc. For me, if i had to pay attention to the specific plot at hand, it would be infinately harder to catch all the other treats hidden within the episodes. and you don't have to look at them which is a huge plus on this board having the spoiler tags.
i'm pretty excited for tomorrow night's episode. I want to know what it is that comes near Jin as shown on the previews!