The families take off from their Pit Stop at Lake Powell, Arizona and receive a clue instructing them to drive to John Ford's Point at a Navajo park in Monument Valley, Utah. There is then a two-person Roadblock in which two members of each family must ride a helicopter to the top of Elephant Butte. They then travel to Gemini Bridges Mohad, Utah, 180 miles away. A Detour requires a choice between Drop Down or Ride Down in which they must either rappel down a cliff or take a six-mile bike ride. All families except the Weavers choose Drop Down. Later, the families participate in a second Roadblock in which one member must do a ski jump. The Pit Stop is at the Salt Like City Library, but the last team to arrive is not eliminated.

The attorney of a death row inmate asks for Booth's help to prove his innocence before he is executed. Booth agrees and asks Brennan and her team to help him out.

After a long absence, Christopher reappears in Lorelai and Rory's lives with an offer to make up for lost time. Luke struggles with what the new person in his life will mean to him and his relationship with Lorelai. Lorelai and Rory enjoy their first Thanksgiving at the Dragonfly Inn, during which Rory receives surprising news about Logan. Meanwhile, as the band prepares for an important showcase performance, Lane has to deal with Zach's jealousy over a song Brian wrote about her.

A gay man with full-blown AIDS collapses in front of House's home and goes into shock. When House discovers the man's father is suffering from symptoms of his own, he must determine if they might be connected and save both their lives. Meanwhile, Cameron faces a potentially life-threatening disease of her own.

Earl tries to cross off number four on his list, "blew dad's chance to be elected mayor". Four years earlier, Carl Hickey ran for mayor to redirect a proposed airplane traffic route over his house and away from the wealthy part of town. Earl unfortunately ruined any chance of his father winning when caught on tape assaulting a police officer. Earl must now help his father get elected and mend his relationship with his father.

Tony is accused of murdering a woman whose body was found at Quantico, and the team must prove his innocence. All the possible evidence proves that Tony is guilty, and the team will give their best to set their agent and a friend free.

During the last episode taped at the ranch, the final four contestants discover how far they have come in terms of weight loss and exercise by doing the same workout from their first day at the ranch. For their challenge, they have enough quarters to equal the weight they have lost since the first episode placed on their backs. Weighted with coins, they must scale the side of the building, and then make a second trip up the side minus the extra weight. The contestant with the most improved time between the climbs wins, and even gets to keep their quarters.

The narration is melodramatic, some of the interviews feel stagy - but the footage of Hurrican Katrina and its horrendous aftermath is staggering. Hurrican Katrina - The Storm That Drowned a City, a NOVA special, begins a year earlier, when a team of scientists created a computer simulation of the destructive effect a powerful storm could have on New Orleans and the Gulf Coast. Though local officials took it seriously, the federal response was skeptical, and little was done to strengthen the city's protection. Using a combination of remarkable video of the developing storm and interviews with scientists, city residents (black and white), and member of the Army Corps of Engineers, Hurrican Katrina builds a compelling story of the disaster as it unfolded. Sophisticated graphics explain how hurricanes form and how the levees failed. The special touches lightly on the possibility that global warming may be exacerbating the intensity of hurricanes, but shies away from the political storm of the meager federal response to the devastation of New Orleans. The result is a vivid, detailed description of the natural disaster, but an incomplete portrait of the social one. - Bret Fetzer

Michael starts monitoring the e-mails sent out in the Dunder Mifflin workplace, upsetting the employees. Meanwhile, Pam believes that the relationship between Dwight and Angela is more than just worker-to-worker, Jim throws an office BBQ at his house, and Michael annoys everyone at his improv class.

Sam and Dean travel to an abandoned sanitarium where they find that the patients once revolted against cruel and unusual punishments given to them by the head doctor. The brothers search the area for lost college students, but the spirits make them go insane, and end up turning Sam against Dean.

When three women from completely different walks of life appear to be infected, Molly and the Red Team discover the connection among them and must locate the common cause.

After sixteen-year-old Lauren Westley loses her unborn child due to a severe abdominal beating, her father's insistance that Lauren was raped leads detectives to the baby's father, but it isn't long before the detectives realise that Lauren was an active party in her own beating, and the two teens had found it necessary to take the steps they did because the abortion clinic kept putting off Lauren's request for an appointment. Novak faces a tough opponent in her own office when she and Branch disagree over the appropriate action to be taken against Wayne Mortens, the young girl's boyfriend.

Christian still has second doubts about the wedding. Gina tries to convince Kimber to leave him. Matt's new girlfriend compares plastic surgery to the work of the Nazis.

All good things must come to and end, and what would a roomie farewell be without some drama for the road?

Anjana and David Devoy started building a contemporary home that curved around a protected chestnut tree in their garden. Kevin McCloud returns to see if their plan worked.