When the NCIS team learn that a missing ten kilograms of highly toxic chemical weapons are now in the hands of Mamoun Sharif, a wanted terrorist, they will have to find a way to find the man and stop him before it's too late.
Veronica and Mac help campus researchers locate a missing monkey who was allegedly stolen by animal rights activists. Meanwhile, Keith is approached by Mindy O'Dell, who claims her husband's death was murder, not suicide. And in the aftermath of his breakup with Veronica, Logan turns to Dick for advice.
Monica manages to seduce Frank and sink her claws back in, but he dare not tell Sheila that he and Monica have been sleeping together. Sheila proves to be a frightening adversary when scorned and Frank could be in real danger. But neither Sheila nor Monica want to share him and he has to decide on which wife he wants. But who will he choose?
This episode demonstrates the production processes for deep-cycle batteries, tins and optical lenses, and shows how each is made.
Luke asks Lorelai to write a character reference letter for his court case. Lorelai, Christopher and Rory have a late but extravagant Christmas.
Mike joins forces with a master-cooper, or in laymen's terms, a barrel maker. Mike also teams up with some mule loggers.
Lucy blackmails basketball star Prince Tyreese into helping her track down a missing rap star; Lucy and Leo's mother announces her plans to re-marry on the anniversary of their father's suicide.
The Most Haunted team visit Brougham Hall in Cumbria and Yvette has a ghostly family reunion.
Danny continues his pursuit of Jordan while Matt competes on an online bid for a date with Harriet. Jack and Wilson must deal with their pending situation about Macau, while Jordan meets with Hallie Gallway regarding a new reality show pitch.
Four more "suitcase nukes" are out there, and Jack's only lead takes him to the home of his brother.
For a lesson on parenting skills Chris is given an egg to take care of as if it were his child. When the electricity bill is over budget, Julius decides to figure out why. Drew a werewolf? That's what Tanya thinks so she's afraid to sleep.
When Ted is constantly insulted by his former boss, who is now working for him on a project, he is told to fire the man, but he finds that a hard thing to do. Meanwhile, Barney offers Lily a lot of money to paint a nude portrait of him.
Bellick gets a taste of the medicine he gave out when he was the Captain and Agent Mahone's ex-wife makes another appearance.
Matt reveals his abilities to his wife. HRG confers with Mohinder. Now that she knows the truth, Claire tries to make sense of her life. Hiro seeks the sword that he is destined to own. Niki must face the consequences of her decision to turn herself in to the police. Simone and Nathan are worried about Peter, who has been in a coma for two weeks. Peter meets a new hero. Micah visits his mother.
The commentator becomes the competition when Gabe Kaplan joins the lineup after taking Daniel Negreanu's seat. Doyle Brunson, Jamie Gold, Mike Matusow, Daniel Alaei, Shawn Sheikhan, and Victor Ramdin look to take on Kaplan on High Stakes Poker.
With everything resolved, Killface tries to buy the Annihilatrix back after Phil sells it to Arabs. Meanwhile, Xander Crews exacts his revenge on Stan until he finds out his entire fortune was invested into Killface's Annihilatrix.
Jealous that New Christine benefits from all the positive qualities she instilled in Richard during their marriage, Christine spites her by revealing to Richard that she gave New Christine the idea for the birthday gift she gave him.
Jake shares that he has heard his mother having sex with her fiancée, Herb; this revelation brings up a repressed memory for Charlie. This leads Charlie to seek help from Rose.
Brent neglects to get Emma a present for Mother's Day, causing her to see red. To make matters worse, Hank shows up with a present, creating a rivalry in Emma's mind. Oscar takes full advantage of the situation when he realizes that he can get away with anything, due to Emma's distraction. Lacey and Davis try to out-embarrass each other, while Karen and Wanda have some trouble putting together their purchase from a Swedish Superstore.
A young school girl is raped and murdered, but D.C.I. Connor still has no leads a month into the investigation. When Walker orders a review of unsolved cases, they turn up similar cases of raped and murdered teenage girls over the last ten years, and they find themselves searching for an apparent serial killer.