I'll start with a small one - How does Jin go in the season 2 finale from not wanting to leave his pregnant wife alone on the known, safe beach to being completely fine with her going on a boat to find the Others? It doesn't make any sense and screams of plot contrivance for the sake of getting Sun into a more interesting storyline than just sitting on the beach twiddling her thumbs all episode.
But that one's really nothing, there are some much bigger fish to fry.




