A missing teenage boy with disturbing drawings in his notebook could pose a serious threat to the students at his wealthy school. Atwater wants to make a good impression on a prominent African American police Captain and Olinsky and Michelle find themselves in a difficult situation and turn to Ruzek and Burgess.moreless
Severide's old friend arrives, hoping for a second chance with the Chicago Fire Department. Meanwhile, Mills tries to regain his active squad status, Mouch confronts his fear about meeting his child, and Brett and Dawson set out to have a big night out.moreless
Mouch learns he may be a father. Dawson and Casey agree to take a break. The new Chief makes a tactical error and tries to put the blame on Casey. But Casey finds and unlikely ally in the case against him.moreless
There's a new chief at 51 while Chief Boden takes leave, and he brings with him a relieving firefighter who none expects they would every work with. The new chief's methods of leadership are quite different than the crews at 51 are used to ...moreless
The race is on to catch one of Chicago's most deadly arsonist's before he gets to one of them...
Leslie Shay's sister visits to get some closure on her Shay's death and the investigation into her arson continues
Severide and Dawson conduct their own investigation into the fire that killed Shay. Casey and crew come to the rescue of one of their own. Mills takes a personal interest in a victim of domestic violence. Bowden grows closer to his father.moreless
Dawson takes chances at the scene of a hazardous spill and the fallout impacts her relationship with Casey. Severeide's new bride reveals more of her history. Mills faces retaliation from the mob father of a teen who dies under his care.moreless