Lost/Recap/S06/E12 The Last Recruit

Season 6 Episode 13:

The Last Recruit
As Jack finally meets "Locke" face-to-face, the War for the Island begins in earnest when Widmore sends the Man in Black an ultimatum and Sawyer siezes the chance to enact his plan. In the flash-sideways timeline, Locke and Sun are brought to the hospital while Jack learns about his half-sister with some help from Desmond.