
Naval Criminal Investigative Service Special Agent Leroy Jethro Gibbs leads a group of colorful personalities in investigating crimes -- ranging from murder and espionage to terrorism -- that have evidence connected to Navy and Marine Corps personnel. The team includes MIT graduate Timothy McGee, Ellie Bishop, who specializes in international threat assessment, charismatic and unpredictable Nick Torres, and forensic psychologist Jack Sloane. Dr. Donald "Ducky" Mallard brings his vast experience in forensics into play to help solve cases.
Special Agent Pride (Scott Bakula) and Gibbs follow leads after evidence suggests the Privileged Killer has a copycat; DiNozzo receives a special souvenir from Bishop.
McGee's girlfriend, Delilah, turns to the team for help when she finds a break in a controversial case; McGee considers asking Delilah to move in.
When a Navy officer turns up dead on a rural road, the team must figure out if he was killed because he knew too much about an attack on a fellow officer; DiNozzo and McGee start a cleanse.
Sara Carter begs Gibbs to investigate her mother's murder; she believes the wrong man was convicted; Abby is awarded a dinner reservation for two to a new five-star restaurant in an igloo and has to decide which co-worker deserves to go with her.