Gideon and his team track down a copycat bomber terrorizing a quiet community.
Jack, Locke and Kate learn more secrets about the hatch. Meanwhile, after being beaten and taken captive, Sawyer, Michael and Jin wonder if their captors are fellow survivors or the dreaded "Others." Flashbacks reveals more of Locke's past in this episode as well as the introduction of Helen (guest star Katey Segal) who shakes things up even more with her revealing personality and past.
It's Saint Valentine's Day and love is in the air. Ulrich forgets, so at last minute writes a poem for Yumi. However, when William presents Yumi with flowers, Ulrich gets jealous and reads the poem to Sissi instead, hoping to elicit jealousy from Yumi. The two end up in a fight, both bothered and wondering if the other really likes them. Also, a man possessed by Xana leaves a necklace at Aelita's door, Aelita is convinced that it was Jeremie who got it for her. Since Jeremie didn't actually get it, he's left to wonder who did, and ends up suspecting Odd, who avoids the question. This puts the two at odds, so to speak. Meanwhile, Aelita's necklace takes control of her and forces her to deliver herself to the Scyphozoa. Luckily, Odd arrives in time, and is able to save Aelita from the Scyphozoa by "threatening" to kill her.
Back in their high school days, Earl ruined Randy's chance to score a touchdown during a key football game; now Earl must figure out a way to make things right.
As Mackenzie begins the transition into the office of President, she has to select a Vice President, a situation in which Nathan Templeton tries using to his advantage. Mackenzie's daughter, Rebecca, faces a crisis when her diary goes missing, which contains information about her mother that could hurt her.
Mike visits a coffee plantation in Hawaii and learns about the long process in how to make coffee, from picking the beans to roasting them. Mike then goes to Sausalito, CA to be a marine mammal rescuer and help rehabilitate some injured seals.Finally, Mike learns about ostrich farming, from their daily upkeep to collecting their eggs.
When Cheryl wins two tickets to visit Hugh Hefner at the Playboy Mansion in a charity-raising contest that Jim secretly entered her in, she decides to take Dana instead of him.
Matt is getting out of control, and Sean, Julia and Christian are trying to find a solution. Quentin and Christian help two students whose faces are glued to the behind of a third student. Christian starts losing interest in the threesome relationship between Kimber, Kit, and himself. He asks Quentin to get involved with Kit to take her off his hands.
Actress Julia has to put on the show of her life if she's going to scoop that first prize. She's decided to hire a butler to help her out, but will the others mark her down for cheating?
Gibbs is ordered to talk to a convict that is about to be executed, in order to discover information about the place where he hid his victims, but when the plan doesn't work, the team must solve the case in their own way.
Byker Grove follows the lives and relationships of a group of young people who are members of a youth club.
When career criminal Wolfgang West gets put away for four years, his wife Cheryl decides it's time for her family to go straight. But can the Wests change the habits of a lifetime?
While Michael and Dwight are out of the office for the day trying to close a deal on a new condo for Michael, Jim and Pam arrange for the staff to participate in an "Office Olympics," where the workers play strange, invented games (among them, Dunderball, Hate Ball...and Pam Pong) that they usually play while the boss is out. At the end of the day, the festivities cheer up everyone - even the oblivious Michael.
Sookie hopes to reconcile the estranged Gilmore girls by asking both Lorelai and Rory to be godparents to her kids, but things don't go as planned.
On TransNational flight 2485, a man possessed by the spirit of the Phantom Traveler causes the plane to crash, leaving only five survivors left alive. Sam and Dean must exorcise the angry spirit before it attacks the survivors. The brothers realize the only way to do that is to take the battle to the skies.
The Kelly Nolan trial continues, but Alan, Denny and Brad run fear the worst when Kelly's cold demeanor begins to turn off the jury. Meanwhile, Garrett and Sara are enlisted to help Denise in her divorce settlement and Malcolm convinces Tara to represent Johnny Damon, Edwin Starr's nephew, whose performance of War strikes a nerve at a nightclub.
Benson is on her way out for the evening when a call comes in from a little girl who says she's all alone. While trying to draw the girl out, Benson is drawn deeper into the little girl's life, and although the other officers begin to suspect the whole thing may be some sick joke, Benson is convinced that the little girl is the real deal. By talking to Maria, Benson is able to ferret enough information from her so that they have a place to start, but Maria's captor has an affinity for electronics and has done everything he can to make sure that no one can find the little girl he bought and paid for.
The search of a missing 17-year-old girl, whose trip to Miami turns into an ongoing nightmare.
Jack's old mentor, Gerard, comes to Nolita with a strange request. He wants Jack's food to feed him to death. Meanwhile, Steven and Seth's authority drives Jim to find his way up the kitchen hierarchy with ineffective results.
Mona decides to embrace her birthday for a change and throw a party honoring Dee Dee and her. However, the event is spoiled by Phylllis's gift to Mona: a certificate to have her eggs frozen at a fertility clinic. Meanwhile, Dee Dee receives a great job offer with a law firm, but decides to pass because her instincts tell her something else will come along. Her friendship with an NBA star soon leads to a new opportunity for a career.