Carmen Corral

Holly pushes Saul and Sarah to their limits; Kevin encounters prejudice in the workplace for the first time; Justin struggles with a hero's welcome from a soldier he saved in Iraq.

Ben is challenged on his final day as a rookie; John's reliance on painkillers grows; Lydia and Josie's working relationship is tested; Sammy continues his search for Nate's killer.

John deals with the aftermath of his kidnapping; Sammy closes in on the robbers; Lydia pursues John's kidnappers.

John takes drastic measures to try to save Hicks; Sammy's lie weighs heavily on his conscious; Lydia and Ruben track down a John Doe; Ben's relationship with Elena grows serious.

A drug dealer's funeral brings gangsters out into the open; Lydia and Ruben investigate the murder of Sgt. Hill's son; Ben suspects that Sammy did not destroy the tape; John sinks into loneliness.

Cooper and Lucero are kidnapped and held hostage; Sammy searches for Strokeface; Ben tries to throw Sammy off the trail; Brooke becomes increasingly irrational.