Dad and I watched the entire series on YouTube. In the second season, the series was retooled and renamed, with nine volunteers working together as one team traveling across the wilderness rather than staying in one place. Due to the greater difficulty for survival of large and inexperienced groups backpacking so remotely, each participant had an emergency GPS unit that could summon a rescue team to evacuate them from the experiment. After the first few days, almost half the participants leave the show via these GPS units. 4 people finally finish the experiment after almost a month. They are rescued by a train.
Not sure I would ever want to do it but it is good stuff.