Casey Tutton

Charles and Manning disagree on how to handle a patient who is poisoning herself, while Halstead has suspicions about Natalie's new boyfriend.

Dr. Choi and Dr. Marcel don't see eye to eye over the treatment of a patient's chronic pain. Rumours circulate about Maggie and Dr. Manning works to help a young boy, but she is challenged by his parents who believe in only using holistic remedies.

Dr. Choi and Dr. Charles have difficult decisions to make as a dying man tries to preserve his life with a controversial scientific method. Dr. Marcel and April clash over how to handle a mysterious patient, and Will questions Natalie's capabilities.

Manning and her 3-year-old patient are trapped in a helicopter as the toddler's stats decline; Charles isn't sure Choi's alcoholic patient with liver failure has quite hit rock bottom.

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.

Dr. Charles and Caroline set some major plans, while Ava fights to keep her relationship with Connor. Agent Lee then informs Will of news that may put his life in danger.