While in a Panamanian prison, Michael must find a mysterious fellow-inmate hiding in the sewer system; Lincoln searches for Sara; troubling news about L.J.
Lincoln receives a deadly warning from the Company after his failed attempt to rescue L.J. and Sara; Michael formulates an electrifying escape plan; a face from the past haunts Mahone.
Michael races to find Whistler before Mahone; Lincoln runs into an old friend and makes a new one; T-Bag slithers his way into Lechero's graces; the prisoners threaten a revolt due to a lack of water.
Determined to speak with Sara, Michael enlists T-Bag's help to get to the only phone in Sona; Lincoln tries a daring rescue; Whistler comes clean to Michael; Bellick makes an enemy while trying to get back on his feet.