Dr. Shaun Murphy’s attention to detail complicates his first day at St. Bonaventure Hospital. Meanwhile, Dr. Claire Browne learns a valuable lesson about honesty when confronted with a difficult diagnosis for her patient.

Dr. Shaun Murphy suspects his patient is lying about the reason for her injury and makes a controversial assumption about her motives. Meanwhile, Dr. Neil Melendez’s personal life could be affecting his work and, ultimately, his patients lives.

The team at St. Bonaventure needs to quickly discover the truth behind a young college student’s unexplained injuries before his condition worsens. Meanwhile, after losing his most prized possession, Shaun’s distraction during a surgical procedure may end up risking more than just his job.

Shaun’s proposed treatment for a homeless patient puts him and Dr. Kalu in Dr. Andrews’ crosshairs. Claire tries to overcome Dr. Melendez’s reluctance to do a risky heart operation. Dr. Glassman faces a difficult decision about his health.

Dr. Shaun Murphy and Dr. Alex Park treat two patients who collapse at the local airport and whose symptoms point to an infection that may become airborne. The staff races to contain the infection before it spreads to the rest of the patients in the ER, resulting in a hospital quarantine during the holidays.

The hospital is still in quarantine as Dr. Shaun Murphy continues to be overwhelmed by the chaos and noise in the emergency room; Dr. Morgan Reznick struggles to keep her patients alive, and Dr. Audrey Lim fights for her life. Meanwhile, Dr. Neil Melendez and Dr. Claire Browne must find a way to complete their patient’s bone marrow transplant, despite the quarantine.

Dr. Shaun Murphy is desperate to join the team on a dangerous procedure involving a patient’s tumor removal. However, having been removed from the surgery team by Dr. Jackson Han, Shaun must use his talents to help figure out the cause of an infant’s injuries.

Dr. Shaun Murphy proposes a radical surgery to save a woman's life after what he believes was a disastrous first date with Carly. Meanwhile, after the new chief of surgery, Dr. Audrey Lim, announces that the residents can lead surgeries, Dr. Morgan Reznick and Dr. Alex Park compete for the chance to operate on an elderly patient who has been diagnosed with cancer.

As Dr. Marcus Andrews vows to help a good Samaritan who was injured while stopping a sexual assault, Dr. Audrey Lim faces a difficult decision when a young patient’s parents suspect that Dr. Neil Melendez made a mistake. Meanwhile, Dr. Shaun Murphy fields advice following his disastrous date with Dr. Carly Lever; and Dr. Claire Browne gets a surprise visit from her mother.

Shaun visits his father on his deathbed and the family reunion reveals unexpected results. Melendez, Park, Reznick and Claire treat an injured star NFL player with severe spinal damage. Claire addresses her mental health.

Despite everyone else’s doubts, Shaun is hopeful that Carly is truly fine with his friendship with Lea. The team treats a young boy born without a fully formed trachea and unable to speak, and who may be a good candidate for an experimental procedure.

The city of San Jose is rocked by a massive earthquake that puts the staff of St. Bonaventure Hospital on high alert as they race to assess the damage and account for the safety of their colleagues and friends. Meanwhile, Dr. Neil Melendez and Dr. Aaron Glassman are attending a charity event when their lives are threatened by the earthquake.

Dr. Murphy treats a patient who has an illness that is not only unpredictable in nature, but also unlike anything he or the team has seen before. Dr. Claire Brown continues to work through her grief, still reeling from Dr. Neil Melendez's death.

Shaun has a hard time balancing his fears and concerns about potentially jeopardizing Lea's health and wanting to be with the woman he loves. Claire looks for a way to grieve Melendez's death. Park and Mia discuss their future together.

After bringing in an incredibly unique and complicated spinal surgery, Dr. Aaron Glassman challenges the residents for an opportunity to join him in the operating room. Meanwhile, Shaun and Morgan disagree on how to treat a comatose patient with a cancerous tumor.

The St. Bonaventure team travels to Guatemala on a surgical mission to help patients at a rural hospital. Once there, the team faces a small community that is in desperate need of their help but are assigned the daunting task of identifying who they can help most. And while Shaun seems to be thriving in Guatemala, Lea is still struggling with the loss of her baby.

Dr. Shaun Murphy must perform a risky surgery on a patient without electricity when the power suddenly goes out. Meanwhile Lim and Dr. Mateo Rendón Osma’s relationship deepens as they overcome difficulties during the surgery.

Shaun and Lea's upcoming engagement party has everyone in a festive mood; a young single mother learns her son may have contracted his cancer from a surprising source; Mateo finds out if his previous issues in America will be resolved.

Shaun and Lea happen upon a terrible car accident and discover a young pregnant mother who has been badly injured and needs immediate medical attention. Dr. Glassman is apprehensive when a figure from his past reaches out for help.

The team must deal with a mass casualty event that forces them to put aside their emotions following a recent tragedy.

Dr. Claire Browne returns from her work in Guatemala for a personal medical examination. Elsewhere, Dr. Glassman struggles to manage Hannah, who remains unresponsive to his attempts to help. Park seeks out the perfect last-minute wedding location.