To get the next data card, Michael, Lincoln and Sucre must crash a police benefit. Meanwhile, T-Bag arouses suspicion on the first day at his new job.

The gang, with Don's help, must break into a safe at the Treasury Department to get the next Scylla card. Elsewhere, Gretchen manages to escape.

Lincoln, Sucre, Sara and Roland follow a Scylla cardholder to Las Vegas, where Roland has his device commandeered after he gets caught gambling.

A daring plan is hatched to get the final card from Pad Man, and an uneasy alliance is formed with Gretchen - but there's a traitor among the ranks.

The team needs to make their way through a 30,000-gallon water main to get to Scylla. Meanwhile, T-Bag fends off an investigation.

Michael and the gang pull off the Scylla heist from deep within Company headquarters - but a terrible surprise awaits them.

As the gang deals with Don's betrayal, Lincoln is captured. Meanwhile, Don forces Gretchen to help him by holding her daughter and sister hostage.

Lincoln and his men (Self, T-Bag, Mahone) are trying to find Scylla. They try to find a clue for the key from the fake buyer who killed Gretchen. They find a Church and an Estate that matches with key. When Lincoln and Mahone investigate the Estate, Lincoln finds a picture of him with his mother. Mahone finds out that, picture was edited and some clue about meeting place. Lincoln takes the meeting and finds his mother. Christina wants 2 days from Lincoln for eliminating Krantz. By the way Company's men finds Michael and Sara, they run away with truck and escape again. At last Lincoln goes to meeting place again and beginning of the end starts.