Brooke Whipple

With only 3 left in the competition, the participants struggle to claim the $500,000 prize. While some continue to deal with the mental game, a new predator threatens a survivalist's longevity.

While some participants continue to work on new ideas to gain calories, others hunker down to try and last as long as they can. With the struggle to procure food this late in the competition, the threat of being pulled out becomes all the more real.

Take a look back at some of the most incredible moments from past seasons of ALONE.

As the challenge comes down to the final four participants, Chilko lake continues its onslaught on those struggling to survive.

The participants test new strategies to get hold of food as the predators pose a serious threat; someone is concerned they consumed a poisonous plant.

The mental toll of isolation begins pushing participants' psychological boundaries to their limits. One survivalist gets caught in an off-putting standoff, while the increasing emotional cost of solitude afflicts another.