S4, Ep1 – Be My Better Half
Goodwin clashes with new hospital COO Gwen Garrett while April questions whether Ethan’s sister is using drugs again; Charles confronts his past actions.
S4, Ep2 – When to Let Go
An overflow of patients is rushed into Chicago Med following an apartment blaze and Rhodes tries to save a firefighter’s life, while the two Halstead brothers face their own personal battle.
S4, Ep3 – Heavy Is the Head
A sick boy is brought to the hospital, forcing Ethan to face a tough decision that grows into a complicated and dangerous situation.
S4, Ep4 – Backed Against the Wall
The CPD pays Dr. Halstead an unexpected visit; Ethan is skeptical of a woman experiencing chronic pain; Natalie takes care of a cancer patient whose brother refuses to help.
S4, Ep5 – What You Don’t Know
Will must lie to Natalie; Ethan and April uncover compromising information about Emily’s boyfriend; Ava isn’t sure what to do with a patient who doesn’t want treatment.
S4, Ep6 – Lesser of Two Evils
Manning and Halstead work quickly to save a physically abused wife; Choi and April discover a shocking truth about a 14-year-old cirrhosis patient; Rhodes and Lanik face off in the ER.
S4, Ep7 – Poison Inside Us
The ED goes on lock-down due to a deadly chemical spill that threatens the lives of patients and leaves one of Med’s own in the balance; Rhodes and Manning attempt to perform live-saving surgeries.
S4, Ep8 – Play by My Rules
Dr. Charles and Dr. Choi are at odds over surgery. Dr. Rhodes finds himself in hot water.
S4, Ep9 – Death Do Us Part
Will and Natalie prepare for their big day, but an unsuspecting Will soon finds himself sidetracked.
S4, Ep10 – All the Lonely People
A shooting outside the hospital injures April and leaves the ED shaken up; Halstead returns after a stint in the witness relocation program; Charles and Elsa have an emotional confrontation; Bekker is reluctant to attend an event honoring Rhodes.
S4, Ep11 – Who Can You Trust
Halstead takes heat for making an unauthorized move to treat his pregnant patient. Choi becomes personally invested when treating a homeless veteran. Rhodes and Bekker deal with a patient who desperately needs a liver transplant.
S4, Ep12 – The Things We Do
Dr. Halstead rushes to rescue Dr. Manning from a chopper crash. Drama between Dr. Rhodes and Dr. Bekker boils over. Dr. Charles and Dr. Choi work to help a patient with their addiction. April helps Elsa deal with losing her first patient.
S4, Ep13 – Ghosts in the Attic
Halstead hides the theft of his gun from a suspicious Manning. Tensions are still high between Connor and Bekker, who take a risk operating on an HIV-positive patient. Hank breaks down when he sees a patient from his past.
S4, Ep14 – Can’t Unring That Bell
Connor, who is in hot water with the hospital’s Oversight Committee, handles a gunshot victim with unexpected ties to Halstead. Maggie feels guilty about the return of a former patient. Charles has an awkward first date.
S4, Ep15 – We Hold These Truths
Natalie and Maggie witness a pickup truck plow through a street fair and must make tough decisions on the fly. At the hospital, doctors and nurses are on high alert with the influx of patients. Dr. Charles’ ex-wife comes to town with news.
S4, Ep16 – Old Flames, New Sparks
Halstead treats a woman on the verge of freezing to death. Dr. Charles’ ex-wife receives some concerning news. Choi handles a lymphoma patient with viral meningitis and a complicated family. Manning makes a house call.
S4, Ep17 – The Space Between Us
When a car unexpectedly smashes through the ambulance bay doors, Dr. Choi makes some difficult decisions in an effort to save a worker trapped beneath the wreckage and April, who’s also in danger.
S4, Ep18 – Tell Me the Truth
Dr. Rhodes receives an alarming phone call that prompts him to rush out in the middle of an important surgery. Dr. Halstead comes to the aid of an FBI agent who is brought into the ER, but he suspects there is more to the story than he is being told. Dr. Manning and Dr. Choi find themselves on opposite sides of a major disagreement over doctor-patient confidentiality.
S4, Ep19 – Never Let You Go
The hospital goes into lockdown mode when a man with a gun holds medical staff hostage. Goodwin is forced to make a tough decision. Dr. Rhodes begins to realize his time with his father is getting short.
S4, Ep20 – More Harm Than Good
Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself. Dr. Rhodes throws some serious accusations at Dr. Bekker. Dr. Halstead has suspicions about Natalie’s new boyfriend. Dr. Choi tends to Bernie.
S4, Ep21 – Forever Hold Your Peace
Caroline shares news that forces Dr. Charles to make a serious decision about their relationship. Maggie meets her sister’s new boyfriend but danger may lie ahead. Dr. Rhodes experiences a huge loss. Dr. Choi and April face an unexpected challenge.
S4, Ep22 – With a Brave Heart
Dr. Charles and Caroline set some major plans; Ava fights to keep her relationship with Connor. Agent Lee informs Will of news that may put his life in danger.