Nick Jandl

The team partner with `The Sherlocks', a private investigation team, to investigate the murder of a petty officer outside DC.

Casey and Severide find themselves at odds after Casey argues with him over the best way to save a teenager trapped in barbed wire.

Juliette is focused on finishing her album but puts everyone she loves in second place. Deacon's life hangs in the balance. Season finale.

Juliette's team have growing concerns that she may be suffering from post-natal depression.

Rayna travels to Natchez to help Deacon and it becomes clear how much their shared past is affecting his current life-or-death struggle.

Juliette shares the stage with guest star Steven Tyler, while Rayna grapples with Deacon's liver transplant.