The ten remaining teams depart Cai Be, Vietnam, on the third leg of a race around the world for one million dollars.

After Mrs. Krabappel confiscates her class's cellphones, Bart spikes Krabappel's coffee with liquor, which lands her in trouble with Principal Skinner.

Cleveland, wanting to make his new stepdaughter like him more, asks her to accompany him to the school's father/daughter dance. All goes well until Cleveland has a mishap with the family pet and ruins his chance.

In order to get a promotion at work, Stan has to convince the dictator of Isla Island to sign a treaty. Stan meets the general and accidentally kills him and has Roger pose as the leader of the small island nation. Meanwhile, Steve and Snot become competitive to see who can get farther with the other's mom.

Jeff pitches the idea of doing a Seinfeld reunion to Larry, who refuses at first, until he realizes how he could make it pay off personally.

As the citizens of Fairview try to make sense of a recent attack in their neighborhood, Lynette withholds a secret from Susan. Gabrielle gives niece Ana advice on how to get a guy's attention, whereas Bree worries how her affair with Karl will affect her friendship with Susan, and Angie is determined to protect her son and her family's past.

After finding a lump on her breast, Lois goes to the doctor to get it tested. Thankfully, the tests come back benign. However, the doctor looks into her family medical history and reveals that Lois is actually Jewish. Peter is eager at first for this new change, but after being visited by the ghost of his father, he changes his tune.

Dexter misplaces evidence which could expose his secret. Meanwhile, Miami Metro must juggle two serial killers at the same time, as the Vacation Murders might bring the city's tourism industry to a grinding halt.

Andy tells a young pregnant woman whose had a heart attack, that in order for both her and her unborn child to be saved she'll need a heart transplant. However, the transplant is jeopardized due to unexpected complications with the donor's family.

Jane may regret trying to save a model from trouble only to find there is more to follow. Grayson & Kim may wish they hadn't taken on their latest case after a widow won't sell her house because there are too many memories of her late husband.

While attending a New York film society function, George introduces Jonathan to a filmmaker, who asks him to rewrite a screenplay. Later, he goes out with a party girl and leaves the script at her home, which happens to be a shrink's office. Jonathan asks Ray to pose as a patient to recover the script. Meanwhile, George encounters his ex-wife and her smug new husband.

When Mia is offered a MAJOR modeling contract in Paris, Peter decides he'll go with her. But he soon realizes he doesn't fit into her sophisticated world. At a posh party, feeling frustrated and insecure, an unlikely guest offers an escape, snorting something. Soon enough, Peter's 'trip' goes terribly wrong. Back at Degrassi, Alli is concerned when new girl Jenna focuses on becoming Clare's friend. There's no way this is going to end well - and no way Alli's going to let it...

When Mia is offered a MAJOR modeling contract in Paris, Peter decides he'll go with her. But he soon realizes he doesn't fit into her sophisticated world. At a posh party, feeling frustrated and insecure, an unlikely guest offers an escape, snorting something. Soon enough, Peter's 'trip' goes terribly wrong. Back at Degrassi, Alli is concerned when new girl Jenna focuses on becoming Clare's friend. There's no way this is going to end well - and no way Alli's going to let it...

As Robert worries about news of his recent heart attack leaking to the press, Kitty struggles with an untold secret that will deeply affect their marriage and bring the Walker family together like never before. Meanwhile, Kevin and Scotty discuss the real possibility and challenge of surrogacy.

The team re-opens the 1995 case of a skateboarding prodigy who lived on the streets.

Viola gives everyone a surprise at the Hump Bar while filling for a singer. Michael wants to know why General Ludwig will come to Fort Marshall. Denise shows a different side of herself at the FRG Golf game.

Don decides to include Betty on a company business trip. Pete lends a hand to a neighbor in his apartment building

Hank starts working as college professor and soon gets into trouble while Charlie interferes with Marcie's romantic life.

When Matt Damon and LeBron James send out a charity call, an unwilling Vince takes up the challenge. Ari tries to convince his wife that his deal with Terrance will be lucrative. Drama ponders a switch in careers. Eric makes plans to meet Sloan.

The team take on more scientific challenges. Jem Stansfield decides to build a rocket powered by toffee and then thinks it would be a good idea to ride it. Liz Bonnin investigates our sense of smell and whether it can make us smarter. Dr Yan Wong demonstrates the connection between electricity and magnetism. And Dallas Campbell explains nuclear fusion by going to the circus.

Graham's guests tonight are Ozzy & Sharon Osbourne, who talk about Ozzy's new book I am Ozzy. Alongside the Osbournes, Ricky Gervais talks about his new blockbuster film The Invention of Lying. Later Olivia Newton-John talks about her career. The audience reveal some of the worst lies they've told and Graham's new game is played for the first time.

When Rita takes Hallie to the doctor to discuss birth-control options, she makes the shocking discovery that she is pregnant.