Synopsis

Driven by disparate motivations, Jack and the Man in Black both seek to extinguish the island's core. As the island begins to unravel, the Man in Black simultaneously forfeits his immortality. Still clinging to the hope of escape, he battles Jack, inflicting a mortal wound. But with Kate’s assistance, Jack prevails. Understanding his fate, Jack makes the ultimate sacrifice, rekindling the island's heart so his companions can depart aboard the Ajira plane. Hurley assumes Jack's role as guardian o