S4, EP11 "We're All Crazy Sometimes"
After bringing in a complicated spinal surgery, Dr. Aaron Glassman challenges the residents for an opportunity to join him in the operating room; Shaun and Morgan disagree on how to treat a comatose patient with a cancerous tumor.
S4, EP10 "Decrypt"
When the hospital is hit with a cyberattack, threatening to shut down life-saving machines, Lea rises to the challenge and looks to outsmart the hackers to prove herself; the team treats an inspirational cancer survivor who harbors a dark secret.
S4, EP9 "Irresponsible Salad Bar Practices"
Lim is challenged by the unique circumstances surrounding a pregnant patient with an aggressive tumor; after misdiagnosing a patient, Claire makes a disconcerting discovery about certain practices at the hospital.
S4, EP8 "Parenting"
The team treats a teenage gymnast who experiences complications from her intensive training; Shaun meets Lea's parents for the first time.
S4, EP7 "The Uncertainty Principle"
Dr. Morgan Reznik discovers her patient's wealth and obsession with extending his life is a dangerous mix that could end up costing more than he can afford.
S4, EP6 "Lim"
Dr. Audrey Lim struggles to cope with the residual emotional trauma of COVID-19; Dr. Claire Browne suggests a radical treatment to help a war veteran who has PTSD; Dr. Shaun Murphy declares he doesn't want to teach the new residents anymore.
S4, EP5 "Fault"
Dr. Murphy questions his decision to give the new residents autonomy when an intern's misdiagnosis has dire consequences; a patient has a ruptured cyst affecting key functions of her brain; Dr. Morgan Reznick and Park bond over failed relationships.
S4, EP4 "Not the Same"
Morgan and Shaun's pregnant patient with twins has pain, forcing the doctors to grapple with a decision no one wants to make; Shaun asks Lea to move back in despite her reservations.
S4, EP3 "Newbies"
With several candidates vying for residency at St. Bonaventure, Lim tasks Shaun, Claire and Alex with mentoring the top first-year resident contenders; Shaun inadvertently insults Lea while discussing the pros and cons of a controversial surgery.