Daniel Kyri

A series of false alarms at a private school hinders 51's ability to respond to legitimate emergencies. Kidd asks for ideas to surprise Severide on his birthday and Cruz and Brett rent out their extra room but get more than they bargained for.

The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51. Boden and Severide are asked to make peace with an old foe for the greater good. Brett receives family news while Foster plans a party with friends.

A series of teen opioid overdoses sees Severide partner with Sean Roman, but he begins to suspect there's more to the story than his old friend is telling him. Casey tries to be there for Brett as she considers her birth mother's offer to meet.

Casey and Severide disagree on a call, while Boden starts a diet and Brett's birth mother shares life-altering news. A familiar face has a proposition for Herrmann.

A suburban house fire involving a mother and son hits home for Casey and Gallo. Meanwhile, Kidd has a charitable idea to help give back to her community.

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.