Dan finds himself between two girls when his childhood friend, Vanessa, returns to N.Y. and declares her feelings for him, just as he and Serena are trying to figure out what they mean to each other. At the masked ball, Blair sends Nate on a scavenger hunt, but Nate is distracted by his feelings for Serena. Although Blair said that outsiders were not welcome to the party, a disguised Jenny and Dan sneak into the ball. Finally, Lily asks Rufus to accompany her to an Eleanor Waldorf event only to make Bart Bass jealous.

Emerson, Ned and Chuck are hired to prove that a pilot was murdered, rather than committing suicide, but soon become involved in a case of stolen jewelery and an escaped prisoner.

The town council also hands out its first punishment to one of its citizens. And pigs, rats and flies become a problem in Bonanza city.

Sarah is jubilant when she wins the lottery until she remembers that, as a practicing Muslim, she isn't supposed to gamble.

Jason and Grant finally travel to Salem, the place that sparked Donna's interest in the paranormal. There they investigate the Lyceum Bar and Grill, which is built on land once owned by the first victim of the infamous Salem witchcraft trials. Then, when Jason must race back home due to a family emergency, Grant is left to direct the team in their investigation of the Hawthorne Hotel.

The investigation turns to the family as the BAU and local authorities race against time to locate a young girl who has disappeared from a shopping mall in Potomac Mills, Virginia.

Jaime heads off to college as she works undercover as a British transfer student in order to investigate a professor who may be selling neural implants to terrorist organizations. However, the seemingly straight-forward task becomes complex when Jaime develops feelings for Tom, the professor's assistant, who is also a suspect.

Addison starts to have erotic dreams concerning Pete and helps Maya when she comes to her claiming to have Gonorrhea. Cooper struggles to deal with Violet when her Ex shows up. Dell does his first pap smears with less then promising results.

Model-actor Tyson Beckford gives the contestants tips on being a spokesperson. Later, the models divide into groups and create a public-service announcement for a charity. The winner stars in a photo shoot directed by Mary J. Blige. Everyone then participates in a recycling photo shoot.

The latest murder case takes Detective Taylor to a whole new world and he must figure out why Cheryl Duncan looks so life-like. They also discover something shocking about the murderer while online.

Stan and Kyle are being held captive at the Pentagon until they tell the government exactly how they got into Imaginationland. ElsewhereCartman will not give up his quest to make Kyle follow through on their bet to suck his balls.

Nick finds he has a lot in common with Simon, Tripp's nemesis. In a case of sibling rivalry Jeremy and Juliet decide to try and outdo each other for their separate birthday parties. Brian Jr. wants to tell Brian's wife the truth. Karen tries to get Freddy into a fancy country club.

A woman, wearing an angel costume, is found dead. Crews and Reese must figure out if it was suicide or murder. They find out the victim might have been involved in a scam involving Russian brides. The big problem they face is that they can't get to the ringleader.

After a week spent drifting around Kansas waiting for a calm spell to end, Josh, Sean and the rest of the crew are on the hunt again. They chase a huge mesocyclone across the heart of the Texas Panhandle and into the Canadian River Valley, a wilderness area completely devoid of paved roads, making the storm virtually impossible to intercept. Against Josh's orders, Sean races the TIV down a dirt road toward the point of interception, but ultimately panics and orders a retreat from the valley that threatens to trap him and his crew in the middle of the massive storm. Within a few days the team hits pay dirt when Josh manages to place SCOUT and TIV in the center of three tornados.

Team Hughes needs a win in the next fight in order to factor in the quarter final matchups. Hughes teaches Dan a lesson; also, the sixth preliminary bout ends in controversy.

Coming Soon...

When their mother's grave is vandalized, Sarah and Laura become contestants on their favorite TV show in hopes of winning enough money to replace the tombstone.

Jack finds himself in trouble along with the girl's football team when they attempt to raise some funds. Clo seems more interested in Brett than spending time with Dante. Things heat up between Jack and Steph.

Belle works for her favorite client together with another girl. When he dumps her for the new girl she's upset and calls Ben. He is still struggling from finding out about her secret identity.

Graham talks to Josh Hartnett about his new movie. Mel C, talks about the reunion of the Spice Girls. Plus Rufus Wainwright and his band perform 'Tiergarten'.