Kellerman and Hale blackmail Warden Pope. Michael finds out he might get out earlier than anticipated. Veronica becomes uncertain of her allies.

Abruzzi's demotion in the prison hierachy puts the entire escape plan at risk. Michael finds himself in the uneviable position of trying to protect T-Bag's new "fish" and facing the threat of T-Bag exposing the plan to the guards. The inmates dig themselves into a hole.

Michael is forced to give up Fibonacci's location to Philly Falzone, and Kellerman and Hale get a little unwanted help to track down LJ who has gone missing. Veronica and Nick uncover evidence against the man Lincoln was convicted of murdering.

The escapees and Dr. Tancredi are shocked when they learn the identity of Michael's visitor, who brings with her a very important piece of the escape plan.

Michael sees proof his plan is working, so he begins to overcome the last obstacle. As the escape draws near, the group tries to reduce its number by one and targets T-Bag.

As Lincoln is about to be executed, he briefly sees his father in the viewing room. A phone call from judge Kessler delays the execution. After reviewing the newly surfaced evidence, the judge orders the exhumation of Steadman's body.

Michael creates a new, more dangerous, break-out plan, involving going through the prison yard. An accident puts Michael's new plan in danger.

Lincoln is worried about Michael's sanity while Michael has trouble remembering some parts of the prison schematics. Sucre has to conceal the hole in the guard's break room. Warden Pope transfers Michael to solitary after he declines his request.

Michael must get the key to the infirmary and enlist the help of an old face, while Lincoln learns the identity of his kidnapper and another inmate learns of the escape.

Westmoreland wants Michael to speed up the planned escape, and gets Bellick one step closer to unraveling it. Michael has to decide whether to involve Sara in the breakout plan. Tweener's devotion is put to a test. Veronica finds out that her ally unexpectedly has a connection to an inmate serving time at Fox River.

Everyone's ready to make their escapes across the high wire. Veronica and Nick realize they may be in over their heads. And Agent Kellerman helps Vice President Reynolds calm down before her debate.

As the escape is in progress, Warden Pope and Captain Bellick begin a search to detain the escapees. Michael and co. have to reach the aircraft fast as the police is hot on their heels. Veronica discovers a major piece of evidence that could prove Lincoln's innocence. The Vice President is worried about losing her authority.

As eight hours has passed since the escape, Michael, Lincoln, Sucre, C-Note and Abruzzi attempt to evade their seekers. Bellick is forced to relinquish the command of the search party to FBI Special Agent Alexander Mahone whose ingenious approach makes Michael's life as a fugitive harder. As a result from her overdose, Dr. Tancredi is in critical condition. A short-handed T-Bag faces the ultimate challenge.

Bellick is anything but happy about his sudden homecoming-to Fox River.Elsewhere, Michael and Lincoln might face a homecoming of their own. Mahone and Kellerman use everything they got to make certain that Michael and Lincoln do not get through their road trip alive.Sucre's getaway plane encounters some difficulties. T-Bag closes on Mrs. Hollander.