Daniel Kyri

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.

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

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.

Severide and Boden search to uncover whether arson was the cause of a fire at a hair salon; Mouch, Herrmann, Otis and Kidd make a startling discovery while tracking down the missing piercing nozzle from Engine 27.

A series of false alarms at a private school hinders 51's ability to respond to legitimate emergencies; Kidd asks for ideas to surprise Severide on his birthday; Cruz and Brett rent out their extra room but get more than they bargained for.

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.