When a U.S. Army unit arrives in Iraq for their first tour of duty, they quickly find themselves engaged in a bloody firefight and discover the essence of who they are as soldiers. Some show more mettle in the face of death, while others become paralyzed
After his injury, Bo's estranged, alcoholic father visits him while he's recovering in the hospital. The rest of the unit are assigned to a dangerous roadblock where they are forced to shoot two drivers when they refuse to listen to the unit's commands.
When a colonel uses physical and mental distress to force a prisoner to give up the location of stolen missiles, the unit begins to question interrogation methods used by the colonel. Meanwhile, Bo requests to be taken off morphine and Terry is by his side to help him through the withdrawal pains.
During an important delivery mission, the supply trucks are helped through a dangerous area by skillful shots by Angel. Meanwhile, Terry makes the house wheelchair accessible before Bo's return.
After a mission, Smoke is implicated in the death of a civilian. The unit's reporter disappears when he suggests that the civilian's death was set up by an Iraqi. Meanwhile, Smoke's mother's condition worsens after she hears of his situation and Bo begins to walk with his new prosthetic leg.
The team goes on a mission to rescue a journalist, John Moffett, when they get word that the Iraqis kidnapped him and have threatened to hug him. Meanwhile, a bounty is put out on Smoke and Bo reunites with his family back in the states.
At a makeshift prison guarded by the fire team, an Iraqi inmate with explosives strapped around him threatens the team and their safety. Meanwhile, Mrs. B is given leave so she can care for her autistic son.
The fire team is sent to protect American oil workers while they build a pipeline through an Iraqi villiage. Meanwhile, Bo pushes the limits of his new leg when he tries running on it and Mrs. B travels to Hollywood where she runs into trouble.
When millions of dollars are uncovered in a mansion during a sweep, the team has to decide whether or not to turn over the money. Meanwhile, Mrs. B returns from her absence and Bo gets into an argument with Terry over his discharge from the Army.
When a U.S. soldier is taken hostage, Angel single-handedly prevents the situation from getting any worse. Back in the states, Sergio's relationship with Anna progresses and Vanessa continues to try to make up for her past actions.
Scream is ordered to evict the residents of a local orphanage, but is conflicted about whether or not he should follow orders. In the states, Sergio continues to deal with his feelings for Anna, and Terry looks into why Bo is no longer receiving a check from the military.
The fire team, assisted by poorly trained Iraqi soldiers, search through a village to find a bomber who continues to avoid capture. In the U.S., Bo confronts his father about taking his military checks from him.
In the finale, the fire team tries is assigned to protect a convoy traveling a highly dangerous stretch of road. While doing this, the team becomes distrustful of Lieutenant Underpants' leadership. In the states, Bo meets with a man who can get him back into the Army and Sergio is surprised by news that Anna delivers.