Tim Hopper

Severide is on edge after the arson attack, fearing what might be in store next. Shay and Dawson, meanwhile, plan to party away their problems.

Chief Boden turns up the pressure on Severide and Casey to investigate the cause of the fire that trapped his wife; Mouch is over-competitive in the firefighter muster challenge.

Dr Halstead must face the consequences of the unauthorised resuscitation. A misdiagnosis leaves Dr Manning to make some difficult decisions.

An unexpected visit throws Casey for a loop and Severide sets out to exonerate a wrongly convicted arsonist. Kidd pays the price for burning the candle at both ends, while Cruz goes on a mission to fix one of Otis's old toys.

Severide starts off on the wrong foot at his Office of Fire Investigation assignment when, despite orders, he reopens an old case. Herrmann is on a mission to discover what caused an apartment fire and Kidd finds herself burning the candle at both ends.

Members of Firehouse 51 are dismayed to learn their boundaries have been redrawn to overlap with an adjacent station, and problems quickly arise. Casey and Gallo hunt a missing piece of equipment. Brett and Foster find themselves at odds.