Ariston Green

Carrie decides to go back to college and Doug's sister Stephanie, played by Ricki Lake, debuting in a recurring guest-starring role, returns to town. (TV-PG)

Five-0 goes on a manhunt when a deliberate chemical spill enables six dangerous inmates to escape, including Kono's husband, Adam (Ian Anthony Dale).

A delirious Eko wrestles with demons from his past, while Locke and some of the other castaways head back to The Pearl – one of the Dharma Initiative's island stations – hoping to find a computer that they can use to locate Jack, Kate and Sawyer. Meanwhile, Jack doesn't know whom to trust when two of "The Others" seem to be at odds with one another.

Sawyer discovers just how far his captors will go to thwart any plans of escape he and Kate might have, and Jack is called upon to scrub up in order to save the life of one of "The Others." Meanwhile, Desmond's behavior begins to perplex the survivors when he starts construction on an unknown device.

Jack is in command as the fate of Ben's life literally rests in his hands. Meanwhile, Kate and Sawyer find an ally in one of "The Others," and Juliet makes a shocking decision that could endanger her standing with her people.

Jack and the castaways begin their efforts to make contact with Naomi's rescue ship.