Anthony Ferraris

Kidd and Severide's honeymoon is interrupted by a dangerous person from their past; Kidd's former academy classmate joins Firehouse 51; Brett and Violet reflect on their relationships.

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.

While Mouch makes an incredible save, all eyes are on a mystery man who helped save his neighbour; Casey worries about his future at the CFD.

Severide wants to implicate the serial arsonist, Dawson and Shay face the unexpected on a routine call, suspicions indicate Clarke is the mole, and Mouch campaigns for union president.

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.

A mishap on the aerial ladder in the midst of a fire rescue leaves Mouch shaken and questioning his abilities; Kidd looks for support from Severide while Casey and Brett discuss their future.