This episode demonstrates the production processes for airstream trailers, horseradish, industrial steam boilers, deodorant .
Agent Prentiss has a personal connection to one of the victims in a series of deaths with religious overtones.
Thinking it's his way into her heart and other body parts, Kenny takes his new girlfriend to a Jonas Brothers concert. His dream of taking their relationship to the next level is crushed when the Jonas Brothers give them purity rings.
Casey spends the day with George at his law office where her need to organize things doesn't mesh well with the way he usually does things. Meanwhile, Derek tries to help Nora land a business deal with a client.
Sam wants to find out how Alan got out of his deal with the devil, but after they are attacked by two demons, Alan disappears and a demon takes an interest in Ben.
Ian drives a car back to the United Kingdom following his travels overseas unaware there is something hidden in it. With her wedding anniversary just around the corner and a party planned, Mimi becomes even more worried about Paddy's absence.
Alex and her family return from the Hamptons, only to pack and prep for a vacation in St. Barts. Meanwhile, Jill launches an epic redesign of her home; and LuAnn pens a book on etiquette---though Bethenny questions her expertise in such matters. In the dueling diva department, LuAnn and Ramona butt heads. Meanwhile, Bethenny participates in a magazine shoot.
When a pediatrician convicted of abusing patients is found dead, Stabler and Benson investigate and soon find ADA Cabot has a reason for becoming involved in the case.
Mysterious footprints and markings are left on the gate of the Fujiwara house. Strange things start going on inside the house and Shigeru verifies with Natsume that the cause of this activity involves the husband and wife who used to live there. And so Shigeru tells story of those two but in a unusually childlike manner...
Harry loses his cool with 3 swimmers that he's forced to rescue just seconds after warning them not to swim in a dangerous area. However, calling them "imbeciles" and "idiots" puts him in hot water.
As they investigate a young woman's death, Murdoch and Dr. Ogden find their relationship threatened when they turn out to be of opposite opinions in the matter of abortion.
Forty men and women from 1 Platoon, Mike Company, 3rd Battalion, Royal Canadian Regiment begins mission-specific training for the most intense combat situation any of them have ever faced.
A teenage girl dies at a school friend's party that Grace's niece was at; Grace has a new partner; Johnny tries to learn more about Earl.
When Sylar comes face-to-face with his long lost father, the reunion proves to be what he least expected. Elsewhere, after receiving a tip from "Rebel", Claire must decide if she will help her sworn enemy, Eric Doyle, evade capture. Meanwhile, as "The Hunter" plans to uncover the Petrelli family's secrets and take control of Nathan's operation, Matt finds himself in the spotlight and on the verge of leveling Capitol Hill.
Aaron Stone has to stop Cerebella, whose video is hypnotizing millions of kids.
The CSIs make a shocking discovery about their murder victim, while Horatio tries to save his son from Julia's erratic behavior.
When a former vice cop is discovered beaten to death in an underpass, DS Ronnie Brooks and DS Matt Devlin find their investigation going in unexpected directions.
Kyle risks losing Cassidy's trust when he begins a deception aimed at discovering Latnok's true purpose, and Jessi, devastated by their discovery, has a hard time putting aside her emotions. Elsewhere, Josh plans a perfect farewell for Andy.
A horrific apocalyptic dream has Allison shaken, as does the earthquake which follows. Convinced that the end is near, Allison seeks wisdom from a survival guru and purchasing provisions. Meanwhile, Ariel has a crush on a upperclassman who needs help with his geometry class
House and the team take on the case of Nick, a book editor who loses his inhibitions. The team realizes Nick has frontal lobe disinhibition, which causes him to speak his mind having no control over what he says and making him just like House. Meanwhile, House suspects Wilson and Taub are keeping something from him.