Daniel Kyri

Brett and Foster question the suspicious circumstances surrounding an attack at a juvenile detention centre. A convoluted new technology at Firehouse 51 tests everybody's patience and Kidd is chosen to represent the district at a leadership conference.

The mattress factory fire spirals out of control. Truck and squad lay it on the line in hopes of getting the trapped victims out alive.

Casey struggles to get Boden to sign off on a new recruit. Foster extends an olive branch to her irritating new medic. Otis inspires Herrmann to seek new partners at Molly's and Brett realises life in Fowlerton will take some getting used to.

Severide and Kidd continue to investigate Benny's old arson case, unexpected news leads Brett to ponder a big decision and all hell breaks loose.

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.

Tensions run high between Casey and Herrmann when the firehouse responds to an apartment complex fire. After discovering something extremely suspicious during the call, Kidd and Severide do some investigating and get CPD on the case.