Episode 1: Impact

After one week of survival school, eight teenagers find themselves at the site of a smoking bus crash, with nothing but their backpacks and the equipment they can salvage from the wreck. Les challenges the group to build a shelter, start a fire and find food. Before long, Becca's injured and crying. But by the time the sun sets, the survivalists are off to a great start.

Episode 2: Shelter

The guys and girls are separated, and each group has to build a shelter. Jen's not thrilled—Becca, Becky and Catarina aren't exactly wilderness experts. But in the end, a simple mistake by the guys' group hands the game to the girls. Catarina starts to show possible signs of heat stroke, but she's feeling better in time for dinner. Tonight's menu: rice and frog legs.

Episode 3: Hunger

The group members are paired off to search for food - frogs, fish, wild edibles and insects - and most of the survivalists decide to make do with the bare minimum. When a large bird wanders onto the campsite, Adam's hunger forces him into action and he manages to take it down. But soon, an unexpected injury takes Adam down for the night.

Episode 4: Navigation

At 3 a.m., Les gives the group a taste of nighttime survival. When an emergency evacuation goes into effect, the survivalists must leave everything behind and head toward a set of GPS coordinates—in the dark. Though Catarina slips and injures her ankle, the group keeps going. But the pressure is too much for Becky, who decides she wants out.

Episode 5: River

After a white-water rafting accident, the group members find themselves soaking wet and stranded on the shore of the river. They eventually get a fire going, and after a cold, sleepless night, the survivalists start to go a little stir-crazy. But the challenge brings out the strength in everyone, and all the group members continue on to the next expedition.

Episode 6: Deep Woods – Pt. 1

Les raises the stakes for Becca, Catarina, Holden and Kareem by separating them from the more-experienced survivalists: Jen, Adam and Zac. While the stronger three build a roaring fire and roast up a porcupine for dinner, the other four struggle to form a plan. Without food, water, fire or shelter, making it through the night may be more than the weaker team can handle.

Episode 7: Deep Woods – Pt. 2

The two groups are instructed to hike east out of the woods with only a watch to navigate. Both teams have trouble finding their way, but the stronger team ultimately finds Les. Meanwhile, the weaker team wanders in circles for so long that they have to be picked up in an SUV. Catarina, Becca and Holden have had enough and decide they want out.

Episode 8: Swamp

After choosing to leave, Catarina changes her mind and returns to the group. But after the survivalists are forced to swim through a swamp, she quickly reaches her breaking point. The cold, wet group members manage to make it through another night, but when they catch up with Les, Catarina opts to go home—for good.

Episode 9: Rock Face

The group is faced with a new scenario when Les tells Jen and Adam that they're both injured and unable to move. When the two are separated for the first time, they realize how much they've been depending on each other. Zac finally has a chance to prove his leadership skills, but Kareem's lack of effort starts to seriously annoy Adam.

Episode 10: Mountain

The final four group members must climb a 100-foot cliff, and Kareem faces his biggest fear. When they reach the top, they find out that they only have one match, and just one shot at having a fire. After creating a successful blaze, the tired team foregoes building a shelter, choosing to depend on luck to get through the night.

Episode 11: Island Castaways

For the final group challenge, the remaining four must survive on a barren island with no idea when Les will return. Jen and Adam continue to be frustrated by Kareem and Zac's inability to match their efforts, and let their egos get the best of them. After two nights exposed to the elements, the group hits an all-time low.

Episode 12: Solo Missions

The final challenge for the remaining members is a solo mission, and forces the survivalists to face their own personal weaknesses—alone. Jen is in the swamp, struggling to build a fire; Adam is facing his hunger on an island; Zac is in the deep woods battling laziness; and Kareem is on top of a mountain, attempting to work around his inexperience.