Nick Jandl

Casey and Severide find themselves at odds after Casey argues about how to save a teenager entangled in barbed wire; Otis tries to convince Casey to participate in the beta test for an expensive piece of new firefighting equipment.

Max is brought to Angels Memorial with breathing difficulty; Willis decides to get to the bottom of what happened to his brother's unit.

Rayna asks Deacon and her daughters to perform with her at the anniversary celebration of her induction into the Grand Ole Opry; Will is uncomfortable with the songwriter he is asked to collaborate with; Sadie reveals her battle to the world.

After Rayna forced Jeff's hand by revealing his indiscretions to the board members, Edgehill Republic begins to crumble along with Jeff's career. Later, Deacon considers a clinical trial he may be eligible for to receive alternative treatment. To cope with her stress, Scarlett turns to writing again and reconnects with Gunnar, who's doing the same.

Juliette hits a career high, including singing a duet with Steven Tyler, but her personal life plummets; Avery takes care of baby Cadence at his parents' home in Texas; Rayna deals with the aftermath of Deacon's liver transplant.

Deacon becomes frustrated when Rayna refuses to let him wallow; Scarlett is wary of performing again; Will's writing partner suddenly becomes unavailable; Sadie ends up in a dangerous situation.