Bash and Mags race to save a woman with mysterious symptoms who was nearly killed by their team's medical error. Theo tries to help a gravely ill teen and his family deal with the possibility that medical hope has run out.

As Bash fights for Dr. Bishop's legacy, big questions about his own future are finally answered.

When a young mother addicted to opioids nearly dies, Bash must figure out whether she's using again, or if something else is causing her deadly symptoms. Mags tries to help a patient who isn't healing properly, while June is blindsided by her father.

When an explosion takes place near the hospital, Bash runs toward the danger. Mags treats a patient without all the information she needs, and June struggles to take initiative. When a schoolgirl is brought into the hospital in cardiac arrest, Theo does everything he can to save her. Through all the chaos, Claire takes the time to help a teenage girl in need.

Bash provides medical care to a friend who is reluctant about treatment, while Mags has her hands full with a young woman who seems to be withholding information. Dr. Bishop offers Mags an incredible opportunity, and someone from June’s past tries to reach out to her. Faced with a young athlete without a clear diagnosis, Theo also has to navigate the patient’s complicated family dynamic.

Bash's psychiatrist suggests an unexpected form of therapy. Mags gets evicted and meets an old patient who holds a grudge. Theo makes some questionable choices with a patient's mother. June's personal and professional worlds collide.

When Bashir Hamed finds himself at the site of a tragic accident, his medical training takes over as he works to save the wounded. At York Memorial Hospital, the staff treat patients from the accident while concerns arise about their Chief of Emergency Medicine, Dr. Jed Bishop.

Bash's life is scrutinized during his citizenship interview; when treating survivors of a building fire, Theo needs Bash's help with a scared young boy; Mags helps a recovering addict who swallowed her keys; June and Bash treat estranged brothers.

Bash finds himself connecting with an unlikely patient, while Mags strives to find balance in her life. Theo has a difficult discussion with his wife, Melissa. June attempts to connect with a closed-off teenage patient and Claire take care of a couple checking things off their bucket list.

Bash and Mags support each other through new challenges while treating an older couple who show up at the hospital glued together. Theo is called out by Liz Bergeron about his repeated inability to follow hospital rules.

Bash treats a man injured in a car accident who was saved by the woman who hit him. Devi decides to fight to hold on to the department. In a moment where it is most needed, a former member of the York Memorial team returns.

Bash is divided between his work at the hospital and a patient he is helping to treat remotely in Syria. Dr. Bishop puts extra pressure on Bash, while Theo feels powerless when something happens to one of his daughters back home. Meanwhile, a patient puts Mags’ moral convictions to the test, and June tries to improve her social skills.

June and Novak have it out. Theo risks his life for a patient and makes a big decision. Bash rises to the occasion during an emergency and sees how far he's come.

When Bash and Mags work together to treat a patient with a tricky diagnosis, Mags realizes that Bash’s experience as a doctor in Syria has led to an instinct-based approach. Head nurse Claire Malone is concerned that Dr. Bishop is already working following his accident. June struggles to put her foot down with Dr. Singh concerning the needs of a patient, and Theo works to build a connection with Bash.

Bash jumps into a sinkhole to save a trapped pedestrian. Mags faces a difficult personal choice, while attempting to contain a potential outbreak in the Emergency Department. Theo does whatever it takes to help a boxer with severe chest pain. June connects with a volatile patient, overstepping Novak. Claire is having trouble adjusting after a past assault.

Bash treats a man with a rare medical condition. Mags gets a visit from her parents and goes above and beyond for a pregnant woman with an undiagnosed condition. A misunderstanding with a rabies patient lands Theo in trouble. June and Novak negotiate a tentative working relationship. Devi starts to make changes.

Mags undergoes transplant surgery and copes with the aftermath aided by her family and Bash. Bash balances personal and professional stress. June confronts Novak's self-sabotaging behaviour. Theo navigates a visit from his father and thwarts Liz's attempt to meet his family.

Bash and Mags fall into friendly competition at work, and a man with superhero ideation crash lands into the Emergency Department. June tries group therapy, and Theo faces a tribunal to decide his fate.

Bash passes on an opportunity, and works cases where things are not as they appear. Mags returns to York Memorial. June navigates loss professionally and personally. Theo goes out on a limb again for a patient. Claire is confronted by Devi and her colleagues about recent challenges.

Bash faces an ethical dilemma with a gang member and the police officer looking for him.

Pressured by a patient's father, Bash must make an impossible choice to save a life.

Recovering from a personal crisis, Mags worries about how to get her life back on track; Bash takes an unorthodox approach to treating a soldier with PTSD; Theo treats a terminally ill child whose father is desperate for a drug trial.

Bash’s focus is split between the needs of patients in two countries; Dr. Bishop’s emergency department goals are met with mixed support.

Bash reels from Amira's bold decision; tensions flare at an after-work dinner party; Devi struggles to keep her staff in line as turmoil erupts over her leadership; Mags treats a highly sensitive person; Theo considers breaking some hospital rules.

Bash has a major realization; Mags faces an overwhelming health crisis; Devi stands behind her choices; June confronts loss; Theo witnesses a devastating event.

Bash's decisions lead to conflict with the new chief of emergency medicine; Mags struggles to save a patient who thinks the system gave up on her; June has trouble with her new roommate, and gets a work proposal from Novak; Theo has trouble adapting.

Bash treats a woman whose ketamine therapy goes awry; Mags loses confidence in her new boss; June realizes she has too much on her plate; Theo reunites with a young former patient whose life may depend on the death of another patient.

Bash and Mags team up to save a John and Jane Doe found in the woods. A fully qualified surgeon now, June sees her old mentor in a new light. Suspended from the hospital, Theo longs for the action while treating patients virtually. Devi makes a budget cut decision, which will have major consequences for the Emergency Department.

Bash tries saving a couple whose wedding was waylaid by gunfire; Mags' demanding teen patient needs birth control; June struggles with an old habit; an activist patient puts Theo in his place.

Bash finds himself at odds with his direct supervisor while they treat a couple of skydivers with a unique relationship; Mags speaks out against her supervising doctor; a mistake comes back to bite Theo.