A series of murders is linked to a serial killer executed a year earlier, and the BAU team must find the link between the dead killer and the new spate of crimes.
Mike enlists an old Army buddy to help take down a drag racing gang which is also in the business of arms smuggling overseas. Sarah joins Mike and KITT despite her father's disapproval.
Tripp and Letitia Darling throw Nick a luxurious birthday party on a yacht; Jeremy reveals his feelings for Lisa to the mysterious Nola Lyons; Brian is reunited with his illegitimate son; someone is arrested for murder.
Richard begs Christine for the return of her old wedding ring which was an heirloom from his mother, in hopes of giving it to new Christine when he proposes.
The contestants head to the New York Botanical Garden to design an evening gown inspired by nature. They have $250 and two days to complete their dress.
Gemma hosts a town fundraiser, bringing the former club member responsible for Opie's arrest back to town; Clay deals with protecting a perverse parolee who can lead to a big payoff.
While Lisbon and her team investigate the murder of a young waitress in the Napa Valley, Jane goes behind Lisbon's back to orchestrate his own undercover operation using Van Pelt as bait.
This episode demonstrates the production processes for javelins, cuckoo clocks, hearts of palm, windshield wipers.
A painter's undiagnosed illness affects his work, and House and his team must look at the man's paintings to determine what's wrong with him.
The brother of an striving actress discovers his sister cocaine addiction and tries to get William's crew to help. Akani races to find Sweton after he mysteriously goes missing.
Claudette encounters a murderous old nemesis; Vic confronts Olivia about her political connections; Dutch's case gets personal.
Broyles calls in the team to investigate a deadly explosion and its source: a strange cylinder unharmed despite the destruction. Olivia determines that the same cylinder, or a similar one, is responsible for similar events in widely diverse locations.
Teenage boy Eric Byers admits himself into the squad room, and warns the team about an unnatural desire towards his younger stepbrother, Cory Kelly. Detective Elliot Stabler and Olivia Benson’s suspicions arise, and Eric admits to also looking at a website to try to curb his pedophilic urge. With no crime committed, the detectives decide to investigate this “self-help” website for pedophiles leading them to it’s creator, Jake Berlin. Eric’s rage induced stepfather is also questioned, and shortly after Eric is found missing. The detectives must race to place the clues together to find and stop Eric before any crime is committed.
DiNozzo's investigation into a Navy Lieutenant's apparent suicide takes a surprising and deadly turn when its seems that it might have a connection to a larger, deadly scheme.
A deadly radioactive ooze imperils the employee of a shady businessman; a caterer is hired for a mad scientist's party; a construction worker has a strange encounter; a handyman meets a female serial killer.
A vampire is interviewed; a babysitter is targeted for a prank; night watchmen encounter a scientist who's disposing of the results of his experiments; an undercover team breaches a government facility.
Tanuma finds out Nyanko-Sensei is a spirit. Tanuma and Natsume enjoy the autumn festival and previous acquaintances are seen again.
There's baby drama on "Lincoln Heights" when Cassie thinks she might be pregnant, which means life could change drastically for her and Charles
When Debbie is given the opportunity to shoot a fashion show for Nylon Magazine, Annie uses the event for a school project. Naomi tries to use the shoot to mend her parents' marriage, but her plan ends up backfiring. Meanwhile, Kelly receives a phone call that changes her relationship with Ryan.
HRG and his new partner go to a local bank heist with four villains; including Peter being trapped in one of them. Hiro and Ando track Daphne to Germany, and meet the Haitian. Tracy Strauss goes to New Orleans to find out more information about Niki. Meredith teaches Claire a lesson about fighting. Usutu shows Matt a series of paintings about him.