A Marine recruiter is found dead on a civilian shooting range with various bullet holes in him, but there is no blood at the scene. The investigators uncover that the victim was dead before he was shot and that his body was pulled onto the range. As the case advances, Horatio determines the murder may be tied to the death of a marine in Iraq who was killed in combat. Likewise, Natalia is shocked to learn that Nick asked Valera out and that she accepted.
Maya begins to struggle with her responsibilities while Darnell works for NASCAR. Meanwhile, Lynn clashes with a collaborator. Big Boi guest stars.
A virus threatens the staff while Matt has to cope with a reduced writing staff. Jordan tells Danny a little secret which could affect the whole NBS network.
Worrying Charlie may get rid of one of them, Berta and Lydia fight over him. Meanwhile, Kandi does everything she can to stop Alan from selling their condo.
The residents of Wisteria Lane celebrate their annual holiday block party. Meanwhile, Gabrielle sets her eyes on a father of a girl she's coaching. Mike is arrested for Monique's murder. Thanks to Lynette, mothers of the neighborhood arrange a protest against Art. This causes his sister a heart attack. And Susan has to cook dinner for Ian's parents.
"You play in dirt, you get dirty." - McNulty Randy has trouble with his friends at school, while Carcetti faces a huge dilemma. Meanwhile, Omar visits Proposition Joe, while Freamon reveals a secret.
Homer is fired and decides to buy an ice-cream truck. Marge makes use of the mountains of Popsicle sticks from Homer's ice-cream consumption by creating sculptures of Springfield citizens with them, leading to a feature about her on the news.
A Toshiko themed episode Tosh meets an unusual woman, Mary, at a bar, who gives her a strange pendant. She is upset, yet amazed by what she now has - the ability to read people's minds. However, Tosh finds this terrible curse, that contains her friends darkest secrets, must be broken. So she asks for help from Mary, the only person who knows, but first, Tosh has to get her into Torchwood.
While on a weekend getaway with Rita, his sister and her new beau, Dexter learns that his biological father, thought to be dead for 30 years, has just passed away, and that he's willed his son everything he owned.
The inhabitants of Atlantis begin to suffer ill effects when the planet's whale population begins migrating to the island city, bringing an unexpected harbinger of doom.
Stewie ties the knot with his old flame Olivia, but their relationship quickly turns, and becomes normal dull marriage. It all escalates when they go on a double date with Brian and Jillian. Meanwhile, Lois introduces Peter to chick flicks, so he decides to make his own movie with a plot based on every chick movie ever.
Zoey, Michael, and Lola are invited into a secret society at PCA. Chase is also invited to join, but he refuses. Meanwhile, Logan desperately wants to join and even pretends to be Chase in order to do so, but his disguise is quickly revealed. Then Logan starts to make his own club, The Logan X, which becomes unsuccessful. Also, Quinn acts weird around the new girl in school, Sara; it seems she's hiding something every time she's near her.
Dr. Rockso and Toki's sudden friendship has the rest of Dethklok uneasy.
Sick of Amber and Ashley constantly winning the school's charity fundraiser, Miley, Lilly, and Oliver team up to raise more cash than the girls. Jackson needs Cooper's help if he wants to beat Robbie at ping pong.
Eric, Annie and Ruthie are on their way home from Scotland, but they are held for questioning at the airport after Ruthie makes an unusual comment. Elsewhere, as a favor to Martin, Mac seeks information about Sandy's feelings for Simon. Lucy does her best to stay strong for the whole family as the truth about her father's health condition comes out.
When Francine discovers Stan's secret, decades-old passion for competitive figure skating, she decides to be supportive and becomes his pairs partner until Stan's competitive nature gets the best of him and he ditches her for a new partner. Meanwhile, Steve's classmate Snot finds new respect among his peers when he parades his mail-order bride around the playground.
Ned tries to get to school early so he can get rid of a note he wrote to Suzie that says "I love you", but the bus driver is distressed over his own recent break-up; Moze tries to get a seat next to Faymen on the bus; Cookie must try to get to school after he misses the bus, or rather, the bus misses him. Ned tries to break out of school to get a free haircut; Moze tries to please Faymen with her hair, and ultimately seeks out Missy's help; Cookie tries to get Lisa Zemo to notice his mustache hair.