As Firehouse 51 welcomes a new member to the team, whose presence could provide some complications, Brett's leadership shines during a scary call; Boden sees great potential in Kidd and proposes an idea that could have lasting repercussions.

Brett and Mackey find their lives in peril. Casey and Brett tread in unfamiliar territory. Severide chases a memory while Kidd adeptly solves a firehouse problem. Ritter puts himself in harms way during a harrowing call.

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level

The story of firefighters in Chicago, both on a personal and professional level