The NCIS team partners with several federal agencies to track a sniper who is targeting crowded events in the city. Also, FBI Special Agent Tammy Gregorio arrives to investigate Pride and his team.

Pride faces further backlash from the FBI when he helps former Navy Intelligence Analyst Elvis Bertrand, who is the lead suspect in a multiple homicide case.

After a decorated petty officer is found dead inside a sports arena, evidence leads Pride and the NCIS team to a kidnapping case of a petty officer who was last seen in Mexico.

Sebastian is kidnapped during breakfast with his Mother and forced to use his gaming skills to assist in a prison break.

Pride and his team investigate the crash of a private plane in a bayou, while LaSalle and Percy interview potential replacements for Brody.

The NCIS team reviews unorthodox training exercises after a Navy Seal candidate is found murdered weeks before his graduation. Also, a concerned Wade turns to Pride after her adopted son, Danny, announces his plan to enter the Navy.

The team investigates a sailor's murder during a rowdy motorcycle rally. Meanwhile, Lasalle asks for advice about his personal life from Gregorio.

Pride takes temporary custody of a 9-year-old boy who's the sole witness to the murder of his aunt - a member of the United States Navy Band.

Foul play is suspected when a Marine corporal who is an amateur race car driver has a fatal crash on the track.

When the Coast Guard boards a yacht that is in an area that is used by smugglers, they find the Captain with the crew's waiter who is dead. They try to get him but he resists and kills him. The Coast Guard calls Pride because the yacht belongs to Javier Garcia. Pride thinks Garcia was smuggling something. He calls the FBI to tell them about it and sends LaSalle to help Gregorio. Pride discovers one of the passengers is someone he knows and that she's engaged to Garcia. Instead of arresting the men who took off the yacht what they were bringing in Gregorio decides to follow them instead if arresting them but things don't work out as planned. Isler wants Pride's friend to help them but Pride says it's too dangerous but she agrees to do it.

Sebastian is sent undercover and Patton exercises his former gambling skills, as Pride and the team attempt a dangerous operation to trap Garcia.

During a murder investigation, Pride gets trapped on an oil rig that's about to explode due to a gas leak.

After thousands of classified government files are stolen, the NCIS team searches for an underground group of hackers co-founded by Pride's old contact, Elvis Bertrand, who are known for exposing corruption among prominent people in New Orleans. Also, Sebastian joins the team as a newly minted NCIS Special Agent.

McGee and Torres come to New Orleans to help Pride and his team search for a missing homeland security theoretical terror playbook.

A gruesome copycat murder on a street car reopens a former case for Wade, evoking painful memories from her past.

Pride's longtime friend, state and military attorney Rita Devereaux, asks NCIS to investigate the disappearance of a JAG lawyer who specializes in classified cases and volunteers at a private military academy.

The team searches for a Marine who assaulted six men in a bar.

Tammy reunites with her ex-husband, who not only embezzled millions in Katrina relief funds, but is also connected to the murder of a crime boss' son.

The team races to find an antidote for a super virus.

LaSalle's old Vice partner is the prime suspect when a link is discovered between the New Orleans police department and an international drug ring.

While Pride listens in on a wiretap of Mayor Hamilton (Steven Weber), the NCIS team investigates a train heist of hundreds of Navy weapons. Featuring a two song performance by GRAMMY Award winner Sheryl Crow from her upcoming album By Myself, including the first single "Halfway There" and the world premiere of "Roller Skate."

Pride thinks he's found a new link between Mayor Hamilton and the illegal activity in Clearwater when a Navy Chaplain is murdered.

After Pride is spotted tracking one of Mayor Hamilton's accomplices, the suspect opens fire on a crowded street before disappearing.

Unable to trust anyone in New Orleans, the NCIS team calls in FBI Assistant Director Isler (Derek Webster) to help expose and stop the sinister scheme Mayor Hamilton (Steven Weber) has planned for the residents of Clearwater, on the third season finale.