Glenn Stanton

Severide comes back to work but isn't his usual self, Mills discovers more information about his father's family and Herrmann asks Molly investors to share ideas that could help turn the business around.

Boden pushes his team to pull it together in the aftermath of the explosion, Casey works to track down a missing Severide, Newhouse brings news about one of Mills' relatives and Herrmann and Otis come up with new goals.

Cruz comes under investigation when Firehouse 51 and Truck 66 collide, placing Molina in a critical condition.