Lenox continues to rankle Archer as the two tackle their new roles. Ripley faces possible suspension over what really happened to Pawel. Goodwin is forced to make layoffs.

Halloween chaos takes over the ED. Asher helps a pregnant woman with an autistic son. Charles clashes with Nurse Jackie on a psych case.

Goodwin's troubles persist. Charles clashes with his former resident over a depressed patient. Lenox and Ripley treat a car accident victim who recently reunited with his college sweetheart.

Goodwin struggles with the psychological aftermath of her attack. Ripley treats a patient with helicopter parents. An ED staffer makes a mistake that may cost them their job.

Gaffney gets a surprise visit from a National Accreditation Board of Hospitals representative. Asher and Naomi search for the cause of a young girl's infection. Lenox and Frost work together to save the victim of an accidental shooting.

Charles and Archer treat a heart transplant patient who believes his new heart doesn't want to be in his body. Lenox takes a personal day. Asher discovers a mass on a pregnant woman's ovary.

The hospital faces a staffing crisis as the nurses stage a sick-out. Archer and Frost bet on who can discharge their patients first. Charles' distrust of a patient complicates his treatment.