The race continues in Switzerland where teams grapple with giant wheels of cheese and climb on the north face of Eiger mountain.

Homer's behavior once again lands him in hot water with Marge and he needs to fathom a way to save his marriage, while a dose of "A Streetcar Named Desire" drives Milhouse to affect a Marlon Brando-esque bad-boy demeanor in an effort to impress Lisa.

After the family car breaks down and ruins their plans for a movie night out, the Belchers find themselves competing on the TV game show "Family Fracas!" To the dismay of the program's host, they keep winning and coming back each night that is until their lucky streak comes to a suspicious end.

Bad ventilation cause hot, moist burger smoke to fill Scottsdale's least funny comedy club. Jon Taffer arrives to clear the air and use proven bar techniques to create bigger laughs and bigger profits for the troubled owners

Francine tries to get Stan to spice up their sex life; Hayley tries to get back into dating and accepts a date with Snot.

The All-Stars must once again work to promote popular Australian Gold products, this time by creating a silent film. One project manager is cast aside when a power-usurping teammate takes over the task. Meanwhile, the other project manager risks everything by going against the advice of a teammate.

When Peter, Quagmire and Joe fly on a private plane to Canada, they crash in the middle of the wilderness, far from civilization.
Peter is chosen to find help, but ends up going missing for two months, only to be found as a feral creature with no ability to communicate intelligently. The Griffins must find a way to bring back Peter to his old self.

When Denise helps Michael sort through Claudia Joy's clothes for charity, the pain of losing her best friend resurfaces. Eddie's impending deployment prompts Caroline to insist on living with her real mother, not Maggie. Gloria regrets moving so fast with Pat when he breaks the news that he'll be deploying the next day. Joan has a hard time juggling work and parenthood when David gets sick from his new drug regimen.

Victims of a bus accident are treated; two doctors join the rotation; O'Hara is happy spending time with her son; Akalitus gives Eddie his job back.

As Alicia represents a girl who accuses a classmate of rape, the case takes on a life of its own when the hacker group "Anonymous" takes notice and brings the trial into the public eye via the Internet. Also, Diane continues to be vetted for a possible Illinois Supreme Court seat and Kalinda becomes suspicious of Robyn.

Jake tries to calm down a bomber in the police station while Leslie is trapped outside.

Bo attempts an unlikely rescue against an army to save two people who are dear to her - unaware of the dangers facing those she leaves behind. Kenzi has an epiphany about Hale. Dyson is given an important clue to Bo's past, just as doubt is cast on his own future.

Daenerys makes a deal for all the Unsullied and slaves in Astapor by offering something of value, against the advisement Ser Barristan Selmy and Ser Jorah Mormont. Jon Snow is sent with a band of wildings to scale the wall, while Arya and Gendry leave Hot Pie at the inn and are made to travel with the Brotherhood without Banners. In King's Landing, Tyrion is made the new Master of coin, while Petyr Baelish is sent to wed Lady Arryn in the Vale. Jamie convinces his captors against the rape and murder of Brienne with the thought of the amount her father may pay in Sapphires for her safe return. Jamie then tries to convince his captors that his father would pay them gold for his safe return to Kings Landing.

At Rygaard, Gabe is desperate to fill out his shorthanded crew-and brings in someone very unexpected. In Florida, S&S' bad luck streak continues when they wreck their boat and get into a fight with the Dreadknots. Joe and Coatsy start roadbuilding-to catastrophic results, and then come up with a new plan to start their own company. And The Swamp Man tries to assist his neighbors and relatives in the aftermath of Hurricane Isaac.

With the slight relaxation of control by the government of Myanmar, Tony is finally able to explore one of the most fabled and beautiful areas of Asia.

Don has a disagreement with a client. Pete entertains a guest. Peggy tries to motivate the staff.

The CSI team heads out to a run-down Wild West tourist town when the owner is found dead. Meanwhile, Kirkland tries to find out how much Jane knows about Red John.

Pope Alexander fights for his life; the cardinals fight for control of the papacy; Cesare and Micheletto track the assassin; Della Rovere prepares to make his move.

Fresh off successful campaign appearances for midterm elections, Selina sees an opportunity to expand her role, but must first curry favor with Kent Davison, the president's icy senior strategist. Meanwhile, there are new developments in the staff's personal lives.

When Riley's client, Lewis Clark, mentions he has a connection to a big time music agent, The Wolf, Riley considers her forgotten dream of becoming a singer. Lacey gets suspicious that Dale has been living a secret life. Riley continues to work on Kyle's defense with his attorney Graham, but Kyle encounters some trouble with a fellow inmate that could jeopardize their efforts. Meanwhile, Evan continues training at the police academy and begins to get close to his fellow cadet, Shelby. At the Rub of Sugarland, Selena teases Derek about the frequency of massages booked by his client Lisa.

Three Viking ships sail upriver towards the very heart of power in eastern England: the Royal Villa of King Aelle. Ragnar Lothbrok has come looking for ransom in exchange for peace. However, King Aelle has a different plan in mind for these northern heathens.

Domenic and partner Sue bought small and built big. A tiny car park was transformed into 220 square metres of living space, but with no lift but has the novelty of 47 steps worn off now they have a new baby?

In this episode, the team look at Britain under pressure. With the population of the UK topping 63 million, what are scientists and engineers doing to reduce the strain on our ageing infrastructure?

Maggie heads 50 metres beneath the River Thames to see how the UK's biggest ever water engineering project aims to prevent raw sewage flowing into the Thames every time heavy rain overwhelms London's sewers; Liz explores the possibilities of urban underground farming, and also finds out how engineers protect us from smells like landfill; while Jem investigates a new idea that could help to tackle the problem of overcrowded graveyards.

DI Hardy knows that he is running out of time to try and solve Danny's murder. Following the discovery of a vital clue though it could finally unlock the case.

Mass immigration from Thrace puts the boys into contact with a sexy Thracian lodger Irina and a dazzling yellow exotic fruit, the Banana. Meanwhile, Marcus has an unfortunate encounter with an elderly war veteran.

BMO makes his way home after being snatched by an eagle.