McCall’s determination to apprehend Mason Quinn, the criminal responsible for Bishop’s death, veers into a dangerous obsession that could cost her everything. Also, Delilah finally meets her mother’s vigilante team…

McCall receives a desperate plea for help from her former CIA trainee, now a full-fledged agent, that leads her into a confrontation with Mason Quinn, the most dangerous enemy from…

When a smuggler being detained by the CIA must be transferred quickly to a secure debriefing site, McCall works with Carter Griffin to ensure he arrives unharmed. Also, Dante deals…

In the aftermath of her abduction, the walls between McCall’s family and vigilante life continue to crumble as those closest to her must come together for the first time to…

Danny and Jackie investigate the suspicious murder of a high rolling investor, who had injuries from a fight, but no marks on his hands. Meanwhile, Frank puts Jamie under house…

A family friend asks Herrmann for some advice on opening a bar. Tensions run high between Emma and Violet. Kidd struggles to keep her team together.

Severide and Herrmann clash over office space. Boden looks at Pelham’s past as he considers making him permanent. Gallo’s resentment of Pelham comes to a head. Brett and Ritter force…

Gallo, Violet and Ritter debut their microbrewery business at Winterfest. Brett prepares to present her paramedicine program to an oversight panel. Firehouse 51 gets in the holiday spirit.

Stella Kidd returns to Firehouse 51. The team must work together to put out a potassium fire in a tunnel. After that incident, Ritter begins to worry about a young…

On a call with Station 37, a firefighter is struck by a power line and decides to lash out after her injury. Brett is visited by Scott and Amelia. Violet…

Boden, Kidd and Severide work together to protect one of their own. At the Fire Academy, Herrmann meets an inspiring young man. Talk of the annual CFD Gala dominates the…

Severide and Seager team up to investigate a fire at the home of a troubled young woman. Pelham moves into 51’s rumored cursed office. Kylie assists Kidd with Girls on…

Chief Hawkins goes above and beyond to help Brett and Violet with a problem. Kidd pursues an open lieutenant position. A blast from the past asks Mouch and Herrmann for…

Gallo clashes with the new lieutenant temporarily filling in for Casey. Severide closes in on a dangerous and deadly arsonist.

As Holmes confronts a medical diagnosis that threatens both his career and sobriety, he meets Michael, a man who credits Sherlock for helping him conquer his own addiction. Also, Holmes…