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.

LAPD liaison Marty Deeks helps the team find an infamous socialite connected to a Navy officer's murder.

The murder of a petty officer in a small town outside D.C. prompts NCIS to once again work with The Sherlocks, a privately funded investigative team.

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.

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.

Rayna brushes off rumors about her and Luke's breakup as she prepares to return to the stage; Scarlett plans a surprise for Deacon; Gunnar travels to Austin intent on mending fences with his estranged nephew.