The BAU and local authorities in Los Angeles investigate gang-related serial killings that might possibly involve a famous comic book artist.
This flashback episode reveals secrets about Dutch (Nick's father) and the relationships he had with Nick, Tripp, and Letitia. Karen's intimate view towards Nick is put on hold as she takes a liking to Simon Elder. Brian's attempt to get his son takes a turn he didn't expect and Jeremy continues to hide how much he is worth from Sofia.
Nikki starts admiring and complimenting with the customers at the Khaki Barn so she can earn more money to buy Jonesy new skates, but when she accidentally calls Jonesy on the one of the new cell phones Caitlin gave all of them, he overhears her flirting with one of the customers and thinks she's cheating on him. Meanwhile, Jen gets stuck in a question booth, and Wyatt lets the gang endlessly prank him so he can finish his new album from humiliation. (The title of the episode refers to Oops, I Did It Again, a single by Britney Spears.)
When Clover reads about the opening of a brand new underwater hotel off the coast of Malibu, she's totally psyched. Only when she tries to make a reservation, she's told that it's for VIPs only. Unless she's a movie star, pop singer or celebutante, she isn't welcome. Meanwhile, Jerry informs the girls (Sam, Clover, Alex and Britney) that water levels around the Earth are on the rise. He sends them to check it out. In a b-story, Alex gets over her jealousy of Britney.
Jaime goes on a vacation with Becca at a spa resort, but things go awry when she's pulled into a deadly game with another guest at the resort.
The designers are asked to create a menswear outfit for Tiki Barber to wear on The Today Show. They have $150 and two days to complete their looks.
Angelica's teacher is having a baby so she brings in a hot handsome substitute teacher that Angelica falls in love with. She tries to date him by failing her assignments. Meanwhile, Tommy, Phil, and Chuckie are part of the tennis club run by Pangborn. Chuckie is trying to avoid showering at the boys' locker room, but when he takes the chance, he realizes he has nothing to worry about.
When a comic book starring Chuckie's favorite superhero Armadillo Dave gets cancelled, he becomes too depressed to help Tommy with his science fair project. Tommy has to buy a rat for his project, but the last rat available is a mean one. It scares everybody. Kimi made Tommy a simple one lane track for his rat, much to his disappointment as he feels he would get a failing grade for it, but needs Chuckie so he can get a good grade on it since Chuckie has done it before. The gang tries to find Chuckie a new hero to worship.
While trying to track down a delusional and violent Marine who thinks he's still in Iraq, the NCIS team will learn that the man has been the subject of a secret experiment - and it comes with a high price to pay.
Booth and Brennan investigate a mall Santa named Kris Kringle who was found dead by two elves. A series of clues makes the murdered mall Santa seem like he's the real deal.
When the paternity of a missing young boy is placed into question, Stabler wonders if he really is the father of Kathy's child. Later, Stabler faces the possibility of losing not only his partner but also Kathy and the baby when she and Benson are in an accident.
Ros is in grave danger after Bob Hogan discovers she's a traitor. Meanwhile, Harry's brought before Yalta's chief, whose identity shocks him to the core.
Under Cuddy’s pressure to choose his team, House gives the candidates a case of a former punk rock star who is a drug user. Whoever diagnoses the patient is going to have a future as a member of House’s team.
In Montenegro, Bob has a moral dilemma when he disagrees with the team's mission. Tiffy discovers some information about Molly's past and decides to look into it further.
Mike Rowe gets dirty with a team of airport runway painters, examines dirty diapers for bad smells and then teams up with a group of spray insulation technicians that get dirty to keep our houses warm.
Have planet hunters finally found proof of other Earthlike worlds? Astronomers have now discovered over two hundred alien worlds, beyond our solar system, that were unknown just a decade ago
Gordon's off to The Priory, but not to rub shoulders with wayward actors and musicians. This priory is a vast, 100 seater carvery in Haywards Heath, Sussex. This unusual venue was once a place of meditation and tranquillity as the chapel of a nineteenth-century convent. It's in a beautiful location and has been offering bargain roast dinners to its regulars for twenty years. But under its current management, things are in need of divine intervention. Owner Scott, an ex-IT consultant, bought the place for £300k but with an aging clientele eating for half-price, he’s now losing a massive £5,000 a week. And despite the heavenly setting, the food is straight from hell: recycled meat, soup in a bucket, synthetic sauces and to make matters worse, a lazy head chef content to preside over food-encrusted ovens and a disaffected staff.
The final two teams go to each other's hometowns and meet each other's parents. Later, the contestants are shocked to discover that a major twist has the final showdown be something completely unexpected.
Ben's mother and grandmother stop by the Work Bench for some supplies for their family reunion. However, things go sour when the grandmother accuses Sam of being evil and calls him Diablo. Meanwhile, Sam meets a lady who has been the Devil's girlfriend for over twenty years and wonders whether her daughter is the Devil's daughter or not.