In the aftermath of Halstead's apartment fire, Marcel, Choi and Archer work together to try to save the survivors. Charles and Med's new fellow, Cuevas, help a paranoid patient. Scott makes a life-changing decision.

Supply chain disruptions dramatically impact Med causing Crockett and Kai, a new surgical resident, to clash with other doctors. Maggie reveals something to Ben. Ethan and Archer help a patient with ALS.

Charles and Cuevas clash over the treatment of a paranoid patient. Choi treats a pregnant patient from Asher's past. Marcel and Taylor help a man who needs a risky neurosurgery.

When a subway train goes off the tracks, Marcel volunteers to help the victims. Taylor and Halstead must decide if they're willing to risk their jobs to save a patient. Asher and Archer clash over a pregnant patient.

The effects of the supply chain shortages continue to impact the E.D. when Vanessa's drug dealer reappears. One of the victims of the recent train crash needs a transplant, forcing Crockett to improvise. Charles and Nellie help a patient with amnesia.

Marcel adjusts to his newfound fame when he helps Halstead treat a local restaurant owner. Choi, Charles and Goodwin aid a new mother worried about hurting her baby. Maggie and Taylor clash with a patient eager to get back to work.

Med runs out of scrubs, forcing the staff to improvise. The life of Archer's son is in danger. Marcel and Charles help a kidney transplant patient experiencing psychosis. Asher and Halstead grow closer.

Will, Crockett and Justin Lieu (a new first-year resident) try to facilitate a trans-organ exchange. Hannah and Nellie help a sexual assault survivor. Ethan and Archer treat a patient whose case could expose a fraudulent doctor. Grant and Maggie take a trip down memory lane.

Will relies on Crockett and Med's newly donated OR 2.0 to save his patient. Charles helps an elderly confused patient who's mourning the loss of his high school sweetheart. As their wedding day approaches, Ethan and April run into some roadblocks.

Charles and Nellie help an elderly patient and her developmentally disabled grandson. Will treats a high school swimmer with a heart condition. Crockett considers using the O.R. 2.0 for surgery. Hannah and Dr. Justin Lieu search for a patient's missing pregnant wife in the woods.

Marcel and Charles treat Lieu's gym buddy. Maggie and Halstead help a robbery-hugging suspect. Asher and Archer use Med's new opiate abuse AI program.

Goodwin, Maggie and Marcel help victims of a hit-and-run accident; Halstead struggles to diagnose a patient with seizures; Asher and Archer clash with Jack Dayton.

A brutal storm rocks Chicago. Halstead encourages Dr. Grace Song to go against her own findings for the benefit of their patient. Asher rushes to the hospital to help Archer's pregnant patient. Maggie's concern for Ben consumes her.

Crockett relies on O.R. 2.0 to save a construction worker's severed hand. Charles and Goodwin clash as negotiations drag on between the administration and the custodial workers' union. Hannah fights to keep a mother and her newborn baby together.

The hospital is in disarray when the janitors go on strike. Marcel treats a young girl injured on her family's farm. Charles and Cuevas' schizophrenic patient returns to Med. Archer encounters a patient with foreign material in her stomach.

Will and Nellie struggle to diagnose a patient with a rare disorder. CFD and Med staff work to free a paranoid father trapped in the MRI suite. Tanaka-Reed gets an ego check.

A documentary crew visits Med to film Marcel and Abrams' groundbreaking surgery. Archer refuses to ask for help for his kidney issues despite the staff's unrelenting kindness. Halstead starts to develop feelings for a co-worker.

Dr. Grace Song launches her pilot program, giving the E.D. a technological facelift. As his health worsens, Archer clashes with Charles on a patient faking paralysis. Hannah helps a pregnant mother with a heart condition.

The fate of the hospital rests on the vote of an incapacitated board member. Archer helps a mother with a rare stem cell disease while Hannah treats the woman's pregnant daughter. Charles encounters a schizophrenic patient with a serious hearing impairment.

Maggie clashes with Charles over a patient who is distrustful of hospitals. Marcel and Halstead fight against Med's new policies to save their cancer patient. Asher and Archer pull surprising things out of their unsuspecting patients.

As Jack Dayton prepares to launch OR 2.0's IPO, Marcel and Grace search for data that may put a wrench in his plans. Charles helps a schizophrenic patient who is anxious about prom. Asher clashes with Abrams when his wife becomes her patient.

Shocking information threatens Jack Dayton's surgery and the future of OR 2.0. Archer goes rogue to save a patient in need. Maggie questions her future at Med.