A Navy lieutenant, otherwise in perfect health, dies under mysterious circumstances; Gibbs and company investigate; the vic's sister disappears; a long-time friend of the siblings recently died. The gang figure it out and bust the killer.
Mr. Schuester starts an investigation when a salacious list about members of the glee club circulates the halls of McKinley High. Meanwhile, Sue is mortified when a video of her performing the Olivia Newton-John classic "Physical" surfaces.
Nichols and Stevens must discover the identity of a killer before another couple is forced to make the most difficult choice. Abel, a deranged social psychologist, forces Ted to choose whether to kill himself or his wife Linda. This is part of a series of experiments Abel is conducting to understand and vindicate his grandfather, Leon. Leon was a concentration camp survivor who was forced by the Nazis to kill himself or his wife. Abel is haunted by the choice and sets out to prove his grandfather did what anyone would have done in that situation.
A straight-laced propane salesman in Arlen, Texas tries to deal with the wacky antics of his family and friends, while also trying to keep his son in line.
When rumors start spreading about Kristin's partying, the blame falls on Stephanie. Audrina starts dating a new guy, but doesn't stop Brody from pursuing her. Spencer gets upset when he runs into Stephanie at Kristin's party.
After the remaining survivors are reunited, Sawyer and Jack hatch a plan to divert the Man in Black's attention and leave the island without him on Widmore's submarine, but disastrous consequences await them. In the flash sideways, Jack investigates the cause of Locke's paralysis and offers treatment.
The police are quickly at the door when Peter's electronic monitor sounds after he chases Alicia out of the apartment. As a result, Grace and Zach scramble to figure out a way to keep him from being arrested.
Murdoch is drawn into the naughty world of Victorian erotica and blackmail when he investigates the murder of Abigail Tunstall, a young woman who had been posing for salacious photographs. Interviews with Abigail's friends and family and the discovery of one of her erotic photos help Murdoch zero in on the location where the pictures were taken a studio owned by a photographer named Marcus Evans. When Murdoch searches through photo collections for clues to Abigail's murder he makes a startling discovery one of McHugh's erotic models is none other than Sally Pendrick, the vivacious and beautiful wife of Murdoch's nemesis, the rich and powerful industrialist James Pendrick.
Luther returns to work after a traumatic arrest to investigate the murder of a former child genius's parents, and quickly deduces that their daughter is responsible. However, unable to find evidence to convict, he becomes embroiled in a battle of wits with the suspect - who has set her sights on him and his estranged wife.
When a murderous inmate takes hostages, Raylan must scramble to defuse the situation before the bullets start flying.
The NCIS team races to save one of their own when they receive video evidence of Special Agent Dominic Vail being held hostage months after he was kidnapped.
Mike Brewer and Edd China go in search of a Classic Jensen Interceptor from the 1970s. This classic handmade GT cruiser was mentioned alongside Bentley and Aston Martin. At launch, it cost as much as a house, but Mike wants to find a car for £5000 or less.
When Crosby and Jasmine's relationship heats up, they have to decide how to explain it to Jabbar. Elsewhere, Adam and Kristina are on the search for friends but find that the process is more difficult than they thought. Sarah learns about Zeek's financial problems. Meanwhile, Julia becomes the new coach of Sydney's soccer team and Haddie goes to Amber for advice when her boyfriend starts pressuring her into having sex.
While a powerful mind-control chip goes missing, Clover decides she wants to join a sorority. The sorority starts trying to destroy all the other sororities.
Joshua informs Ryan that Anna will be dispatching a shuttle full of trackers to locate and eliminate fifth columnists. He, Father Jack and Kyle decide to shoot it down before it lands. Not all is as it seems however and it's all part of Anna's plan to discredit the fifth column. There's more to the live aboard program that meets the eye. Chad is still carrying on his facade of concern about the Vs and sympathy for the fifth columnists. Father Jack lets something slip but he has a crisis of faith when he thinks they have taken innocent lives. Erica discovers something ...
Teddy invites Silver over for dinner at his house so she can meet his father, but things doesn't go as well as planned when Spence openly disapproves of her. Meanwhile, Naomi finds herself at odds again with her sister Jen when she begins giving Naomi a very hard time as she continues her community service work at the Beach Club. Navid realizes he still has feelings for Adrianna after she asks for his help to write a song as she prepares a solo singing career. Also, Annie learns of her parents problems marital troubles and thinks that their marriage is doomed.
Post-birthday party, Fiona busts her lip open on her cast and Dr. O'Hara and Jackie stitch her up in the Peyton kitchen. Jackie notices Sarah Khouri's philandering behavior and brings up her concerns to Dr. O'Hara. Libby Sussman, the uber-patron of All Saints, is brought into the ER.