In the season premiere, Farida treats a child with a superficial injury, and gets a front-row seat to a custody battle. Charlie comes clean to Dallaire about the encounter between Gary and a dirty cop. Following a bone-marrow donation, Eva asks for a transfer out. Dawn arrests on Cameron’s watch, Gina is wheeled into the ER after her assault, and Nancy deals with the aftermath of a patient’s suicide.

Charlie wants to keep things as normal as possible while Tara begins chemo treatment. A judge orders Gary into reconciliation classes with a racist cop. Farida crosses the line with Erica’s ex-husband, Nick. Recovering from a bone-marrow donation, Eva ends up doing more caregiving than self-care, and Cameron checks in with Gina, who is suffering retrograde amnesia after her assault.

Mel and Gina begin their placement with the disorganized, addicted and cranky Dr. Kesler. Mylo boomerangs back into Eva’s care as Bonnie begins treatment for her hepatitis C. Farida skips therapy and chooses to unburden herself to a long-suffering Dr. Healy. Mould in Charlie’s house has him turning up with his family on his father’s doorstep moments after Eddy shows a home invader the business end of his shotgun.

Farida tries to care for a little girl while fending off her warring parents. Dr. Kesler reveals his Achilles heel to Gina. Charlie and Gary respond to a distress call at a hoarder’s apartment. Nancy receives a special delivery from Sergio from beyond the grave. Mel suspects a case of elder abuse, and Cameron makes a questionable diagnosis.

Gina and Cameron get a shock after treating a gunshot victim. Nancy receives a surprise visit and request from her eldest son, Sean. Marley’s biological grandmother shows up on Eva’s doorstep, sending Amanda and Trevor into a tailspin. Mylo learns the truth behind her father’s death.

Nancy’s finds herself at odds with Dr. Helvi over her handling of a teenage girl’s case. Farida discovers the reason behind Krista’s mysterious rash. Dr. Kesler brings Gina on a house call with disastrous consequences. Eddy finds yet another way to get into trouble with the cops – and Charlie. Cameron’s multiple missteps land him in disciplinary trouble with Dean Dallaire, and Melanie rescues an elderly patient abandoned in the ER.

Gina and Melanie find Dr. Kesler going through withdrawal, forcing Gina to step in and make a tough call. Gary’s unorthodox approach to a reconciliation session backfires. Charlie’s discovery of Eddy’s and Tara’s collusion ends up very badly for an avian dream home. Helvi’s and Nancy’s relationship reaches a breaking point. Farida lays down the law with Krista’s parents, and Melanie helps her elderly abuse patient regain some personal autonomy.

Good news about Tara’s progress is dampened by Charlie’s bad news about the house. Eva tries to deal with Marley’s grandmother while trying to protect Amanda and Trevor. Nancy’s attempt to send Sergio off into space brings her face to face with a life-and-death situation. Gina sees Dr. Kesler through rehab with some tough love. On an EMS ride-along with the dirty cop, Gary and Charlie save a life and learn the cop’s secret. Farida deals with heartbreak.

After four long years, will the students get their coveted white coats?