Plot summary
During the Gulf War, Sayid and his comrades are detained by Sam. DIA agent Kelvin Inman orders him to torture his superior for the location of a captive American pilot, which he does when he learns that the man was indirectly responsible for the death of his family, only to discover that the pilot is already dead. Sayid is released and vows to never torture again. In the present, Danielle Rousseau shows Sayid a captured man she believes is an Other, who identifies himself as Henry Gale. Rousseau injures him, forcing Sayid to take him to the Swan for Jack to treat him.
Suspicious of Henry's story that he crashed on the island in a hot air balloon, Sayid has Locke seal them in the armory and tortures Henry, letting his emotion over Shannon overwhelm his reasoning. As the Swan alarm goes off, Jack restrains Locke until he opens the armory. He does, but goes a few seconds over time and the timer displays hieroglyphs before he enters the code, resetting things to normal.
Credits
Adapted from Wikipedia contributors, Lost season 2. HTML formatting and reference markers removed.