Desmond Gray

Hank and the team investigate the execution-style killing of a child whose father was mixed up with a notorious gang.

Archer and Choi respond to a scene that brings back some bad memories; when Carol's condition worsens, Manning is willing to do whatever it takes to get her mum feeling better.

Vanessa and Archer disagree on how to handle the victim of a motorcycle accident; Scott and Charles deal with a UNICEF negotiator with repressed trauma; Hammer and Halstead treat a high schooler with Addison's disease and a clingy mother.

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.

Choi helps a patient with chronic pain find a solution; Halstead considers a new path; Charles and Anna bond over a scary situation.

A patient with early onset Alzheimer's is brought in, leaving Dr Charles and Dr Goodwin worried about Dr Halstead. Maggie and Ben are concerned when one of Ben's students is admitted. Dr Manning and Dr Marcel disagree.