While Mason and Della run a solemn errand up north, Strickland tracks down the sergeant originally assigned to the Dodson case. Before returning to L.A., Mason drops in on his…

In the run-up to the first debate, Selina makes a novel campaign proposal. Comments by Jonah create blowback. Dan and Amy take a road trip.

Agathe, headed back to Milwaukee to investigate John, crosses paths with Alice. Tom receives critical new intelligence that may give him the upper hand in his plan to influence the…

Julia spends a couple of days at 51. Boden’s stepson returns, desperate for Boden to help his mother. After a little girl starts a fire in her backyard, Kidd and…

Julia spends a couple of days at 51. Boden’s stepson returns, desperate for Boden to help his mother. After a little girl starts a fire in her backyard, Kidd and…

Severide agrees to a bone marrow donation but a work accident throws everything into flux. Casey and Dawson try to find harmony at home. Meanwhile, Otis and Mouch decide to…

Tensions run high when trucks from two firehouses collide and fingers are pointed towards Cruz for his driving.