Anthony Ferraris

Cruz and Severide suspect foul play when a fire started by an elderly woman turns deadly. Kidd, Foster and Brett create a women's-only lounge. Firehouse 51 celebrates some good news.

Boden pushes his team to pull it together in the aftermath of the explosion, Casey works to track down a missing Severide, Newhouse brings news about one of Mills' relatives and Herrmann and Otis come up with new goals.

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.

After responding to a time-sensitive rescue, Casey and Severide don't see eye to eye on the best course of action.

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.

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.