When a pregnant woman's body is discovered in a burned-out brownstone, the investigation turns to a family of coffee importers.
While on an undercover mission, Ziva's life is put in grave danger when the serial killer she's been tracking becomes suspicious of her.
Although reluctantly, Sebastian accepts a seven-figure retainer to defend a crooked casino owner who allegedly murdered the head of operations at his casino.
After hashing out their differences in Big Bear, one team returns to the mansion and announces to the other teams that they are a force to be reckoned with. Geeks become style gurus when they give head-to-toe makeovers to a group of nerdy girls for this week's challenge. The beauties roll up their sleeves and are tested on their plumbing skills.
Darcy and Emma try to help Snake go back to school. He accepts, but after the "welcome" he receives, he prefers to give up and stay home, which makes Spike consider a break between them. After Holly J. asks Toby to tutor her, she starts liking him.
Adventure in New Zealand does not come without consequences, especially when Scott and Justin meet up with their "larger than life" kiwi friend Ellis. Justin's competitive risk-taking side takes over, while Scott deals with his own fears.
Mike heads to the site of a future California neighborhood where he learns that there's more to erosion control than one might think. Then Mike gets a bird's eye view of Palm Springs as he helps maintain and repair the tram 8,500 feet above the city.
Samantha is suspicious about Regina's action, which lead her to believe she is having an affair. But she's not alone. Todd is cheating on Chloe, who is none the wiser, with Samantha. Dena and Regina are contemplating opening up their own coffee shop.
Dani faces a tough decision: Noah or horse racing, and Matt and Kris find running the dude ranch difficult. Later, while searching for two missing children, Matt and Junior argue.
Allison has dreams that help Scanlon in his search to find out who killed a wealthy local drug dealer. Allison and Scanlon are dumbfounded when Allison's dreams lead them to a severely impaired man with a bullet stuck in his brain. Meanwhile, Joe's partnership with Meghan Doyle is put in jeopardy.
While Lo and Lauren enjoy living at the house, Audrina feels more and more left out. Meanwhile Stephanie thinks it's time to get rid of Spencer and Heidi prepares her next step in her career.
A man is murdered when someone drops a piece of slate off a bridge. The team tracks the slate to one of their own and Alexx's son becomes a suspect. Then to make matters worse Alexx finds him in a warehouse holding a bloody knife over his friend who happened to be the other suspect.
Brennan's father Max Keenan is on trial for the alleged murder of FBI Deputy Director Kirby. Everyone on the team, except for Brennan, is called as a witness for the prosecution during the trial. Brennan on the other hand is the forensics advisor for the defense, and she must rely on both her dedication to her family and her skill as an anthropologist to help free her father.
Moz is a drug dealer and has very strange clientele who come and go from his flat.
Georgina informs Serena that she can reveal a deep dark secret from Serena's past, but no one is prepared for what Georgina does next. Blair and Jenny's power struggle continues when each of them start spreading scandalous rumors about each other on Gossip Girl. Dan sees Jenny's new beau, Asher, cheating on her, but Jenny won't listen to him. Rufus goes to Lily for advice on how to handle Jenny's new behavior. Serena tries to confront Georgina, but she leaves before Serena has a chance. After this, Serena says that she and Georgina are not friends.
The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.
Lucas investigates Dan's heart condition. Haley struggles with letting Dan into Jamie's life. Peyton also still struggles with her guilt over Lucas' breakup and Mouth finally gets the chance to be a sports anchor.
The crew of the Hammersley are joined by a federal agent and go in search of an illegal fishing boat. Whilst on board the Navy find evidence on the boat and find the fishing boat crew start to exhibit symptoms of bird flu. One crew member faces a gruesome operation, while the federal agent learns that blackmail can work both ways.