A Petty Officer, who is a member of the prestigious Navy band, is found murdered and her nephew is the only witness to the crime. Meanwhile, Gregorio considers staying in New Orleans or returning to Washington D.C.. Also, Percy finds out about LaSalle's child and Sebastian considers applying to be an NCIS agent.
- Despite being credited, Daryl "Chill" Mitchell do not appear.
- Sebastian is seen examining the construction site for samples which might contain PCBs while wearing only a paper filter mask. A mask like that will only protect against particles like dust or pollen, not chemicals contained in water or soil.
- Goof: The music teacher is wearing a brown with white dots, long top, over a brown sleeveless T-shirt. From the side the top is not covering her chest. From in front it covers her chest. Despite crossing her arms part way through her appearance and keeping them folded. With her arms folded the view changes to from the side, top not covering, then in front view, top covering. It ends with a front view with top not covering.
|Dwayne Cassius Pride||Scott Bakula||Senior Special Agent in charge of the NCIS New Orleans office, NCIS|
|Christopher LaSalle||Lucas Black||Special Agent, New Orleans Office, NCIS|
|Tammy Gregorio||Vanessa Ferlito||FBI Special Agent, NCIS Confidential Informant|
|Sonja Percy||Shalita Grant||Special Agent, New Orleans Office, NCIS and former ATF Agent|
|Sebastian Lund||Rob Kerkovich||Forensic Specialist, Jefferson Parrish Coroner's office|
|Patton Plame||Daryl "Chill" Mitchell||Investigative Computer Specialist|
|Dr. Loretta Wade||C. C. H. Pounder||Medical Examiner, Jefferson Parrish Coroner's office|
|Raymond Isler||Derek Webster||FBI Agent|
|Javier Garcia||Julian Acosta|
|Theo Beattie||Joshua Bitton|
|Melody James||Brianna Brown|
|Josh Gordon||Michael Daniel Cassady||Former Navy Petty Officer|
|Dustin Matthews||Zailand Adams|
|Heather Cobb||Kanesha Washington||Navy Petty Officer|
|Robert Riley||Judd Lormand||Chief Musician|