Daniel Kyri

Dr Charles and Dr Reese search for answers when a mother brings in her daughter claiming she is possessed. Dr Rhodes and Dr Bekker are tasked with finding a way to save a pair of conjoined twins.

The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51. Boden and Severide are asked to make peace with an old foe for the greater good. Brett receives family news while Foster plans a party with friends.

Tension builds when a group of rabble-rousers attempts to lock down the firehouse. Brett is faced with a monumental decision and Cruz readies himself for a big day. Gallo and Ritter attempt to launch Firehouse 51 into the social media age.

A series of teen opioid overdoses sees Severide partner with Sean Roman, but he begins to suspect there's more to the story than his old friend is telling him. Casey tries to be there for Brett as she considers her birth mother's offer to meet.

Firehouse 51 is thrown into chaos due to a series of mysterious gas leaks. Meanwhile, Brett struggles with feelings about her birth mother. Severide misunderstands his role as Cruz's best man and Mouch bites off more than he can chew.

A pest control problem forces the 51 team to temporarily bunk with Firehouse 20. All under the same roof, Casey clashes with Capt Delaney, while Foster, Kidd and Brett fear Capt Leone has it out for them. Boden mulls a procedural overhaul.