Sean McGraw

Susan takes the escape into her own hands; Lechero reveals a secret buried beneath Sona; Sofia uncovers more of Whistler's past; Mahone's freedom hinges on his testimony.

Deke and Marge embrace new roles to accommodate his new status; things start to thaw between Gordo and Trudy.

In a maximum-security prison, Walker poses as a hit-man to get evidence on an incarcerated racketeer, when Victor Larue, the one who terrorized Alex is brought to trial. At the trial, he manages to get the bailiff's gun.

Walker breaks in a new partner while protecting Alex from an ex-sheriff turned prisoner who blames Alex for putting him in jail and seeks revenge.

When one of Walker's friends in the DEA goes missing and suspected of being kidnapped by Mexican drug lords, he decides to take an unexpected vacation...and heads south of the border.

A criminal Walker arrested years ago is released from prison. But once out, goes back to a life of crime. Trivette goes undercover to infiltrate his gang and get evidence to arrest him again. Alex and Carlos help a teen stay out of gangs.