"Man of Science, Man of Faith" is the first episode of the second season of Lost and the 26th episode overall. The episode was directed by Jack Bender and written by Damon Lindelof. It first aired on September 21, 2005, on ABC. The flashbacks focus on Jack Shephard's struggle to heal Sarah, who would later become his wife. In real time, John Locke and Kate Austen decide to enter the now-open hatch shaft.