Peter DeFaria

Reunion. After returning from maternity leave, Dr. Manning helps treat a teenager with an extensive history of medical issues, Dr. Choi goes above and beyond when a former Navy shipmate has a potentially life-threatening ailment, a budding romance.

You Will Hurt Him. Boden is left to wonder where things stand for Firehouse 51 as McLeod exerts her influence.

Dr. Charles learns a troubling fact about the man who shot him; Rhodes and Bekker reach an accord.

A Rocket Blasting Off. With Keeler's whereabouts unknown, the men of Firehouse 51 are looked at as prime suspects.

Chief Boden (Eamonn Walker) confronts Maddox (guest star Mark Hengst), believing he is the hand behind Serena's (guest star Ilfenesh Hadera) accusations intended to skew Boden's credibility from the approaching trial. Severide (Taylor Kinney) reaches out to Jamie (guest star Rachel Nichols), Maddox's lawyer, in an effort to help out and Capt. Patterson.

It Is What It Is, Until It Isn't. Marcel and Charles treat Lieu's gym buddy. Maggie and Halstead help a robbery-homicide suspect. Asher and Archer use Med's new opiate abuse AI program.