Plot summary
Ben takes the infant Alex Rousseau from her mother despite Widmore's orders to kill them both. He expels Widmore from the island for having Penny Widmore with an outsider, and in 2007, tracks her down to kill her, shooting Desmond in the process. The sight of her and Desmond's son Charlie stops him, and Desmond brutalizes him. In the present, Ben and Locke go to the Barracks, where Lapidus heads back to Hydra Island and Sun goes with them to the temple. Lapidus is restrained by Ilana upon his return when he cannot answer "what lies in the shadow of the statue?" Locke directs Ben to enter the temple underground, where the monster shows him visions of Alex. Alex herself warns him to follow and obey Locke.
Credits
Adapted from Wikipedia contributors, Lost season 5. HTML formatting and reference markers removed.