The families travel from their Pit Stop at the Welbourne Manor, once owned by a general in the Confederate Army, to Charleston, South Carolina, flying more than 500 miles. Once there, the teams drive to a location known as the Battery and find a gazebo, where they receive a Detour clue. This Detour requires them to choose between Forrest Gump and Muddy Waters. The first task requiring them to dehead shrimp, while the second involves riding through a muddy 4x4 course. Some teams that choose the 4x4s are able to finish fast, but others get stuck and one eventually switches Detours. The teams then take charter buses leaving two hours apart to Huntsville, Alabama, where two members of each family partake in a Roadblock requiring them to endure 3.2 Gs on a centrifuge. During the long bus ride to Huntsville, the Weaver Family suffers a breakdown, but manages to find a way of coping. After completing the Roadblock, the teams then log into a product-placed internet service provider and receive a video e-mail from Phil telling them to race on foot to their next Pit Stop, the space shuttle Pathfinder.

Rory does a fabulous job organizing a big DAR bash for Emily. However, at the party, Richard confronts Logan's father, Mitchum Huntzberger, about his opinion of Rory's journalistic talents, while Emily has an even uglier confrontation with Logan's mother, Shria, over the romance between Rory and Logan. Meanwhile, after a small kitchen fire at the Dragonfly Inn, Lorelai needs Richard's help settling the insurance claim and uses the time spent with her father to needle him about the fact that he has been unable to get Rory to return to Yale. Though he's annoyed with Lorelai, Richard has to admit that Rory is not where she should be.

When Earl met a tough biker chick at a Halloween party, it looked like a match made in heaven, but when the costumes came off, the mismatch became apparent and Earl took drastic measures to get out of the relationship. Now, years later, Earl must find a way to make amends for deceiving the girl.

When a corpse of a man is found inside a tomb that comes from the Civil War, the team discovers that the victim, a Sergeant, was buried alive. During the investigation, Abby tracks down the last phone call of the victim. Meanwhile, Gibbs is informed by his new boss Jenny Sheppard that agent Ziva is now a full-time NCIS agent.

As the teams continue to lose teammates, one team begins to lose their confidence. So, their trainer brings in a special visitor from the past to talk to them and help them regain their confidence once again. But will this be enough to get the team back on track, or will the team continue to fall apart, despite their trainer's efforts?

Out-of-shape Jim enters a 10K marathon to teach Kyle, who wants to quit basketball, a lesson about not being a quitter -- but he cheats to get first to the finish line.

Exactly 100 years ago, Albert Einstein grappled with the implications of his revolutionary Special Theory of Relativity and came to a startling conclusion: mass and energy are one, related by the formula E = mc2.

The office is forced into the parking lot for the day when a fire starts in the kitchen. To ease everyone's boredom, Jim suggests a game of "Desert Island" and "Who Would You Do?," where certain staff members reveal a little too much information about themselves. Throughout the day, Michael talks business with Ryan, leaving Dwight feeling left out.

A man dies of a stroke in front of a mirror but Sam and Dean believe something, or someone else (Bloody Mary), may be behind his death. Dean tries to help Sam open up about his girlfriend's death, particularly after Sam lets it slip that there's some information that he hasn't told Dean.

Mike visits the San Francisco Zoo and learns what it's like to be a zookeeper.



He then goes to a haunted cheese factory in Vermont and learns the art of patience.



Finally, Mike learns how to be a volcano ash mud bath mixer (spa technician) in Calistoga, CA and takes a mud bath after a very dirty day.



That's not all - Mike also journeys to a live volcano in Hawaii and gets up close and personal with some very hot lava.

Denny takes Alan to Nimmo Bay, British Columbia, Canada, to help him get over his breakup with Tara. Catherine confesses to Bernard's murder. Sara and Garrett take extreme measures to help Denise challenge her husband's alimony demands in their divorce proceedings.

Faced with her first national crisis - the death of nine DEA agents in Latin America - Mackenzie shows strength and resolve in dealing with a corrupt leader. Meanwhile, Nathan Templeton is approached by an ambitious congressman who served with Mac's Vice Presidential candidate, Warren Keaton, and is eager to divulge potentially damaging info in an effort to derail his nomination. Mac's teenage twins resume public school, only this time it's complete with secret service detail and press spectacle, and while popular Horace welcomes the attention, shy Rebecca finds it overwhelming.

When the teenage son of Stabler's old partner comes under suspicion for attacking a classmate, Stabler's inability to treat this like any other case gets him suspended.

A woman wants surgery to make her look like her when she was younger, to jog her Alzheimer-stricken husband's memory. Christian and Sean work on another Carver victim, who does not have the same physical attributes as the other victims.

Rachel comes across footage of Lacey talking some serious smack about her.