­The team investigates a bachelor party where all three guests are murdered and left in very mysterious circumstances. One of the victims is found hanging, another is found drowned in the toilet, the third suffered from alcohol poisoning and all three are found with their heads shaved, post mortem. After a thorough investigation the team zeros in on a suspect, a police officer that had been bullied by the three victims during high school. The way that all three victims were found corresponds with the way they had tormented the cop, right down to shaving his head. They also discover that the three victims had used their Navy connections to set up the illegal sale of a decommissioned aircraft, and that the bachelor party was actually a front for the deal to go down during. The team figures the police officer had finally taken his revenge and not only killed his tormentors, but also stole their profits from the aircraft heist. However, after the officer turns up dead, the team learns that the real culprit also attended the same high school as the original three victims, and had framed the cop so they could steal the money from the aircraft job. Meanwhile, Ziva deals with her feelings towards Tony and apologizes for ever doubting him.

­When political blogger Matt Burns is found dead after being pushed off a bridge while following up on a tip, NCIS takes a special interest in his murder investigation. On his blog, Burns had accused NCIS of covering up the murder of a young Naval officer, Rod Arnett, who Burns suspected of insider trading. NCIS concluded that Arnett’s car accident was just that, an unfortunate car accident. However, unable to oversee jurisdiction over the Burns’ murder, NCIS reopens Arnett’s case. Things become even more complicated when they exhume Arnett’s body only to find that his body had been stolen. The team suspects that Burns stole Arnett’s body so that he could fuel the conspiracy that NCIS was covering up a murder. It’s discovered that Arnett gave insider information to an unassuming sandwich shop owner that he befriended while taking the train everyday. Hoping no one would ever suspect the two of them as conspiring together they agreed to split the $2 million earning. As it turns out, the sandwich shop owner, afraid his scheme with Arnett was about to be exposed, placed the tip to Burns and met him at the bridge to kill him.

­On Halloween night the team investigates what looks to be the unfortunate suicide Lance Corporal James Korby who is found dead in his car. However, they soon discover that Korby was murdered as his organs are frozen with liquid nitrogen. Someone got Korby to drink the nitrogen and staged his death to look like a suicide. Tony can’t shake the hunch that Sara, Korby’s wife and a three-time marine widower, is involved. We soon discover that Private Singer, who belonged to Korby’s unit, was having an affair with Korby’s wife Sara. Sara also confesses to coming home to confront Korby right around the time of the crime. Just as Tony is about to cuff Sara, Gibbs realizes that Sara had nothing to do with Korby’s death, there was someone else with a real motive. Rachel, Korby and Sara’s teenage stepdaughter, was about to cash in on a pretty hefty trust fund and inheritance and the only way she knew to do it was to kill Korby and frame Sara. ­

­When Gibbs' boat mysteriously shows up in the San Diego harbor with two dead men in it, Vance, Gibbs and Ducky travel to San Diego knowing this investigation needs to be handled with extreme sensitivity. It turns out Gibbs dropped his boat off to Franks in Mexico but Franks is nowhere to be found. Franks shows up at Gibbs' house with his daughter in law, Leyla (Franks' deceased son's wife), and granddaughter in tow. It is revealed that the two dead men worked for a private military company that was hired by Leyla’s mother, Shada, a powerful tribal leader in Iraq, to kidnap and bring back her daughter and granddaughter to Iraq. It was her way of trying to re-establish a relationship with her estranged daughter. Franks takes full responsibility for the shooting but further investigation reveals that it was Leyla who shot and killed the men when she saw them approaching Franks. In the end, the private military company is also held responsible for bounty hunting in Mexico, and Leyla and her mother come to terms. ­

When the power goes out, the team must solve a case relying solely on good, old-fashioned police work.

The team works to solve the murder of a Reverend's son and they soon figure out he may be involved in a hate crime. Gibbs' father returns for Christmas and Gibbs tries to figure out why he has a sudden change in behavior right before the holidays. An old friend of Abby asks McGee for a favour - her nephew (who is living with her) wants to see his mother for Christmas, who is currently on a Marine ship in the Indian Ocean, but only McGee can make it happen.

The episode starts with 2 forest rangers finding a body at the site of a forest fire. The team investigates and finds out that the pilot was flying a jet-pack and crashed. An attorney who dislikes Gibbs tries to keep him from talking to her clients.

Gibbs is worried about Tony's ability to handle his job when Tony's father turns out to be linked to their newest investigation, an assassination attempt on a foreign prince.