Gordon is healthy, and the Clunes trade baked foods for Nate's firewood so Gordon does not have to work so hard. The Glenns and Clunes begin to make money from the "butter and egg business," and the Brooks buy milk goats. Gordon receives a still and makes alcohol, earning a substantial income. A neighbor drives cattle across the homesteads, forcing the participants to erect barbed wire fences. The Glenns' marriage erodes further, and Gordon and Karen feud. "A Family Affair" — The ways the adults deal with the lack of privacy is examined. The children discuss how hard they must work, and become upset whenever livestock must be killed. The participants worry about disease, and a bear wanders onto the Clune property. The families decide to build a schoolhouse, and hire a teacher for the children. Not having children around changes the rhythm of life on the homesteads, and the children adapt to learning in a one-room classroom. The relationship between Karen and Gordon further deteriorates, as does the Glenns' marriage. Karen's mother visits from Tennessee for Logan's ninth birthday. The children celebrate the end of five weeks of school by holding a recitation, and the families celebrate with a sewing bee. "The Reckoning" — The episode begins 10 days before the experiment comes to an end. Each family builds a root cellar. The families begin harvesting their vegetables, and plan a harvest fair. The Glenns slaughter their pig, and the Clunes harvest dry grass. The women reflect on the drudgery of women's lives on the frontier, and many of the participants talk about how hard it will be to leave. The participants learn about the 9/11 terrorist attacks. Neighbors from miles around join the harvest fair. The experts convene to assess the families. All the families had too little firewood, and the Clunes had hay that had too little nutritional value. The Clunes are found to have smuggled a modern box-spring into their home. Gordon announces that half his family will spend the winter in Butte, Montana, as a means of survival. A light snow falls on the final day on the site. The families reflect on leaving the homesteads. Two months later, the verdict is revealed. Nate and Kristen Brooks are on an extended honeymoon. They are judged to be able to survive the winter. The Clunes have moved into a large mansion in Malibu, California. They are