We didn't learn what was down the Hatch though...sure its this guy Desmond who Jack met once and just happens to remeber him (and that was so obvious I'm ashamed of the show), but what is that place? It seems to be some big elaberate undergroiund construction, at first I was thinking a boat or submarine but that half dome room doesn't jive with that. And why are there so many mirrors there? I know he has them set up to see what is at the hatch but it seems like there would need to be morrors there for asome other reason and he just used them for the look out thing.
We see the quaritne that conects with the disease crazy french woman mentioned but really learn nothing there.
The appearence of Walt at the same time as the voices was odd. Did Jack hear the voices when he say his father on the island? There might be a conection there.
And the final bit Mr Voice at the end says that next week we will learn the fate or however it was phrased of everyone. The problem is everytime they tell us this, they don't actually do it.