<P> The series follows the overnight shift at San Antonio Memorial Hospital, where three of the doctors have a connection to the U.S. military . Dr. TC Callahan is an former - Army medic who initially exhibits PTSD - type symptoms, having watched his brother die right in front of him on the battlefield . He frequently breaks rules and butts heads with his ex-girlfriend and newly - appointed head of the night shift, Dr. Jordan Alexander, and the hospital's administrator, Michael Ragosa . Dr. Topher Zia is a private - sector surgeon who previously spent a lot of time on the battlefield as an Army Ranger, while Dr. Drew Alister is a gay Army medic still active in the reserves who initially tries to hide his sexual orientation for fear of backlash . Dr. Krista Bell - Hart is a young surgical resident trying to work her way up the ranks, while fellow resident Dr. Paul Cummings works hard to emerge from the shadow of his father, a famous surgeon at Johns Hopkins . The shift's lone psychiatrist, Dr. Landry de la Cruz, briefly works on the night shift . </P> <P> Jordan is initially in a relationship with Dr. Scott Clemmens, which complicates things when Scott becomes the Chief of Surgery at the hospital and sees that Jordan still has feelings for TC . After a cancer scare, Ragosa finds that he can no longer tolerate the stresses of his administrator job, and he quits that position in order to pursue his original dream of becoming a doctor . Ragosa passes exams, becoming a doctor just before his ex-wife moves his family to Dallas, and he follows . In season 3, Jordan hires new med - school graduate Dr. Shannon Rivera as a replacement . </P> <P> In the season 3 finale, Paul's father returns to the hospital to buy it before a plastic surgery company tears it down . Despite this, he fires Topher due to his way of running the hospital, and most of the staff quits in protest . In the season 4 premiere, the staff returns soon after, save for Topher after he and his daughter are killed in a car accident . </P> <Ul> <Li> Eoin Macken as Dr. Thomas Charles "TC" Callahan: A former army medic and Ranger from Baltimore who witnessed his brother Thad's death in Afghanistan, and immediately had to decide to donate his heart to a fellow soldier . After being discharged, he returned with PTSD and his relationship with Jordan ended . In the first season, his recklessness and sports betting put him in trouble, especially with Ragosa, and was secretly dating Landry . In the second season, he rekindles his relationship with Jordan, but they break up again after she miscarries . In the third season, he dates Jessica Sanders until he learns of her involvement in the sale of the hospital . Afterwards, he leaves on a humanitarian mission with Syd to Syria, which gets complicated quickly . </Li> <Li> Jill Flint as Dr. Jordan Alexander: TC's ex-girlfriend . In the first season, she becomes Head of the ER night shift and dates Scott Clemmens, but she still has feelings for TC . In season two, she renounces the position and rekindles her relationship with TC, but they break up after she miscarries in the second season finale . In season four, she becomes Head of the ER night shift again . </Li> <Li> Brendan Fehr as Dr. Andrew "Drew" Alister: An army medic still active in the reserves and chief resident . He was a nurse until the army paid for his medical education . He tried to hide his homosexuality until he outed himself when boyfriend Rick, also in the army, had an accident, and Scott was forced to amputate half of his leg . Krista convinced him to be brave for Rick . After a fight and temporary breakup, Drew and Rick got married in the second season . He returns to active service early in the third season, but his actions to save a young 15 year - old child bride results in an unwanted early end of deployment . He and Rick later adopt an orphan girl, Brianna . </Li> <Li> Robert Bailey Jr. as Dr. Paul Cummings: a first year surgical resident and Columbia graduate who works hard to emerge from the shadow of his famous father . He is often the butt of the practical jokes by the ER staff . </Li> <Li> JR Lemon as Nurse Kenny Fournette: An ex-college football star who became a nurse after an injury ended his sports career . He has dated multiple staff members and colleagues, including Krista, Gwen, Nurse Diaz and Dr. Bella Cummings (Paul's sister). </Li> <Li> Scott Wolf as Dr. Scott Clemmens: (recurring seasons 1--2, main season 3--) A trauma surgeon and a recovering alcoholic, he becomes Head of Trauma Surgery in the first season . He dated Jordan in the first season then TC's sister - in - law Annie in the third season . </Li> <Li> Tanaya Beatty as Dr. Shannon Rivera: (season 3--) A Native - American doctor whom Jordan recruits to work the Night Shift . She grew up in Foster care . Her initial adversarial relationship with Paul flourishes into a romance . </Li> </Ul>

Who is the doctor who died on night shift