The ten remaining teams continue from Juyyongguan, a gate at the Great Wall of China and received a clue instructing them to travel to a temple in Ulan Bator, Mongolia, a total of 963 miles by bus and train. Once the teams arrive at the temple, they watch a performance and then receive a clue instructing them to drive a jeep to a riverbed in Terelj. The teams then choose a pair of horses and travel to a meadow where they find a Detour --- Take it Down or Fill it Up. The choice was about evenly split, however, two teams faced difficulty on the Take it Down task and switched Detours midstream. After completing the tasks, the teams were required to travel back to their vehicles on their horses--a problem for Kellie and Jamie when they lost a helmet. The teams then drove 47 miles to the Hotel Mongolia, where a Roadblock awaitied that involved shooting flaming arrows. Once the teams completed, they ran only a short distance to the Pit Stop, where another team was eliminated.

When Marge discovers she has a knack for carpentry, she begins her own carpentry handyman service. However, the town of Springfield cant come to grips with the idea of a female carpenter and Marge is forced to disguise her work by using Homer as a front. Meanwhile, Bart begins to blackmail Principal Skinner, when he discovers that Skinner is highly allergic to peanuts.

A hit is ordered on Michael. Marty Trio works with the FBI to get Freddie by wearing a wire. Declan thinks his partner might be a dirty cop.

Laura's marriage to Carl makes her a target of the IRS; Lydia goes to extremes to get closer to Jonah; and Michelle searches for a mate online.

Stan loses his confidence, and his job, when a car salesman gets the best of him in a negotiation. Meanwhile, Roger and Steve set up a makeshift drive-in to try to get to first base with popular schoolgirls.

In 1995, two teenage boys went on a shooting spree at a local mall and committed suicide shortly afterwards. The team is prompted to re-open the case when new evidence suggests that there may have been a third shooter who got away.

It is raining on Wisteria Lane, six months after Mike was run over. He is now in a coma, with Susan by his side. Bree gets engaged to Orson. Gabrielle and Carlos are getting divorced, but they are briefly reunited when their 8 months pregnant surrogate Xiao-Mei runs away. While adjusting to having another child around the house, Lynette realizes that the girl's mother, Nora (guest star Kiersten Warren), is more than she can handle. While at the hospital, Susan is asked on a date by a man, Ian (guest star Dougray Scott) whose spouse is also in a coma. Meanwhile, Edie is desperately trying to sell the Young house.

After Peter uses Meg's money to buy himself a tank, she gets a job at the new Superstore in town. However, the Superstore puts all the shops in town out of business and sucks up the city's power supply. Brian and Stewie team up to save the town from the corporate giant.

Prez learns a difficult lesson during his first week at school; Bunny mulls an offer for a crime-research study; Rawls sabotages Freamon's unit; the mayor reacts to Carcetti's debate bombshell; Proposition Joe suggests reaching out to Marlo; Bunk gets a taste of McNulty's domesticated life.

Kitty returns to LA to an interview for a political based TV show and to visit her family, which is full of secrets.

Bryan Parker is questioned by the FBI after being found alone on the road by a police officer, his hand bandaged. He tells them about a young boy his father had abducted, and soon the team is searching for Todd. The search initially goes nowhere, and Sam continues to question Bryan, but they get a lead when Bryan identifies a snapshot of the boy that reveals his identity to be that of missing boy Daniel Ellison. It isn't long before the squad realises that Daniel isn't the first boy that Parker grabbed, and follow his past to find him and the missing boy.

Investigating the murder of an old friend of Leo's who was working undercover, Angela suspects that the man was a dishonest cop. Meanwhile, she has to decide what to do in her relationship with Dylan, who has disappeared.

Meet Cork, the worlds greatest retarded detective. The legendary Kraken sea monster learns freedom isnt all its krak-ed up to be. Weird al Yankovics Weasel Stomping Day gets a Robot Chicken video treatment! The wishes of children come true, with new dire results. The crew of the Starship Enterprise faces their greatest foes yet Themselves!

Dr. Venture is haunted by a Oni spirit and goes to Dr. Orpheus for help. The boys are kidnapped by a woman claiming to be their mother. And the Monarch tries a change in management.

Tim Lovejoy joins the presenting team, beginning by talking to former American vice president Al Gore about his desire to get rid of the internal combustion engine. Tiff Needell races the new Mitsubishi Evo 9 FQ360 against an aeroplane, Vicki Butler-Henderson drives a Mini GP and Tom Ford gets three nurses to find out how big the Skoda Roomster really is.

Zaf goes deep undercover to infiltrate an Al Qaeda cell that is planning an attack on the UK. When Adam learns that the terrorists are on a suicide mission he tries to prevent them from reaching their target, but events soon spiral out of control.