The third season of Denis Leary and Peter Tolan's Emmy nominated series examines the aftermath of devastating personal losses that the 62 Truck crew experienced at the end of the scorching second season. Tommy is trying to hold his life and team together while dealing with the devastating loss of his son. Franco studies for the lieutenants' exam while "Probie" contemplates the end of this probationary period and now both ponder leaving the house. Lou and Jerry each grapple with or try to hide from the financial crises they're facing. And Sean has a good reason for trying to keep the identity of a new woman in his life a secret. They're all falling apart in one way or another can Tommy make the only family he has left come back together?