Season 4 picks up just 48 hours after the conclusion of Season 3, with the crew navigating the consequences of their decisions. In Syria, TC finds that suffering has no borders and channels his penchant for chaos into saving lives. Back in Texas, Dr. Jordan Alexander (Jill Flint) takes charge to keep the ER running while treating more veterans and military personnel. Parenthood forces Drew Alister (Brendan Fehr) to reevaluate his risk-taking behavior as an ER doctor and in the Army, while learning to raise a teenage daughter. Surgeon Scott Clemmens’ (Scott Wolf) personal life remains anything but easy, but that won’t stop him from diving headlong into his professional one. Paul must deal with the repercussions of standing up to his father and pave his own way. His rival-turned-girlfriend Shannon Rivera (Tanaya Beatty) and charge nurse Kenny Fournette (JR Lemon) will soon learn three’s a crowd in a one-bedroom apartment.