 With the abduction of Walt fresh on their minds and their raft destroyed, Michael, Sawyer and Jin fight for their lives and discover a new predator, that of a large shark, in the roiling, open ocean. More of Michael s background story reveals his desperation and obsession for his son s safety in 1997 New York when his former flame, Susan, sued him for sole guardianship of baby Walt. Meanwhile on land, in a re-telling of the previous episode this time from Locke s point of view, he must descend into the hatch when Kate goes missing inside where they both end up as captives of the mysterious Desmond.