During the wee hours at San Antonio General, a trio of Army veteran doctors-PTSD-troubled loose cannon TC Callahan (Eoin Macken), medic turned shift head Topher Zia (Ken Leung), and closeted reservist Drew Alister (Brendan Fehr)-combine battlefield testing with their healing skills to keep their always-busy ER running till dawn. Medical drama that bowed on NBC in 2014 co-stars Jill Flint, Robert Bailey, Jr., Freddy Rodriguez, and Scott Wolf.45 episodes on 11 discs. 35 hrs. Widescreen; Soundtrack: English. Region Free