Nick Jandl

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.

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.

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.

When Juliette becomes so focused on her album that she puts it ahead of everything else, Avery makes a major decision; Rayna and the girls stand by Deacon as his life hangs in the balance.