Episode Name: ?
Episode Overview: Mr. Eko has dreams about his brother leading him somewhere. He seeks Locke's help in finding a secret location, the "question mark." Meanwhile, Jack and the other survivors grapple with the horrific situation in the hatch with the death of Ana-Lucia and Libby clinging to life.
Episode Number: 21
Episode Season: 2
Episode First Aired: 2006-05-10