Ty Olwin

Mills (Charlie Barnett) and Brett (Kara Kilmer) race to recover a missing teenager and are left stranded in the unforgiving elements, while the rest of Firehouse 51 babysits an abandoned newborn. Meanwhile, Lt. Severide (Taylor Kinney) receives an interesting job proposal and Chief Boden (Eamonn Walker) finds himself at odds with his father (guest star Richard Roundtree) over his treatment and the planning of a big party in his honor.

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.

Dr. Manning rushes to save a young boy who has a life-threatening case of the flu. After discovering that opioid pain killers were stolen during last week's mass casualty, April believes Dr. Choi's sister took them. Dr. Rhodes and Dr. Bekker disagree over the best treatment for a cardiac patient who is 21 weeks pregnant.

Grieving widower Daniel Calder files a civil suit against Officer Paul Evans, the cop who shot his unarmed husband. Also, Daniel’s adopted daughter, Jira, tries to connect with her birth mother, Tia Young, who is conflicted about meeting her daughter, and Paul is assigned a new partner on the force, Officer Diego Carranza (Sebastian Sozzi).

When Gideon is blamed for recent terrorist attacks, he and Captain Conrad work fast to track down the real culprit. But Gideon finds himself in a predicament, when Danny continues to use his technological skills to disrupt the city, leaving Murphy, Ada and the rest of the squad struggling to find a way to stop him. Discover who makes it out alive.