If last week’s episode was the calm, part one of the season finale is indeed the proverbial storm. The survivors aboard the Ark are faced with yet another harsh reality check: with the last drop ship destroyed, they have no way of leaving the station—and only have 51 hours of life support left. Abby, like her daughter, is more pragmatic than optimistic. The futility of trying to save a dying patient sums up her overwhelming helplessness.  When she’s gone, who will protect Clarke? Who will help her daughter cope with her unrequited resentment? As for Jaha, he chooses to revisit the past, to convene with his dead son by watching old home videos. So much potential, squandered now. But what seems like a maudlin trip down memory lane may actually hold the key to their survival. But it’s not just those onboard the Ark who are grappling with existential crises. The prisoners on the planet are bracing for a battle of a different kind, though this enemy, too, seems like one that they cannot win against. I’ll stop here for a moment to point out that The 100 repeatedly deals with crucial calculations and inescapable countdowns. The clock is always ticking and rations are always scarce. But the greatest dwindling resource in this scenario is not a lack of gunpowder (or oxygen); it’s the survivors themselves, be they in orbit or on the ground. But Murphy isn’t content to make Bellamy hang; he wants him to confront the reality that Clarke is the group’s real leader, that Bellamy is nothing more than a coward. It’s been clear throughout this season (especially in “Day Trip”) that Bellamy is painfully aware of his shortcomings and is constantly at odds with his own personal demons. As it turns out, the Grounders have problems of their own. Anya, specifically, suddenly finds her leadership usurped by a new Grounder, Tristan, who was sent by the commander. And here I thought Anya was the top of the Grounders’ food chain. Tristan will lead the attack at dawn. What I found interesting here was that he referred to the 100 as invaders. Which is true, in a way. Clarke, Bellamy and the rest may see their return to the surface as a homecoming, but to the now-indigenous Grounders, the old, ruined world was a home they never left behind. And speaking of food chains, the Grounders have a much bigger threat to contend with, namely the Reapers. But more on them in a bit. The more interesting development here is not even Lincoln’s return, it’s the idea that he would risk his life for his former tormentors. Even Finn understands there’s more at stake for Lincoln than just Octavia’s love (though I’m sure that would be enough to motivate a lot of people, including Jasper). “What my people are doing to yours is wrong,” says Lincoln, shedding some light on his murky motives. But even as he, Clarke and Finn escape underground to evade the advancing Grounders, the only light at the end of this tunnel turns out to be Reapers. And the Reapers, as it turns out, are cannibals. I have to say, this show is willing to go to some pretty dark places, and this episode is no exception. Not only do they tell us the Reapers are cannibals, they show us. I’m with Clarke when she says the more they learn about this place, the less they know about it. Meanwhile, back in orbit, Jaha may have found a way for them to survive, even if it means the near-total destruction of the Ark. By Sinclair’s calculation, their odds of surviving reentry into the Earth’s atmosphere are only 5%. But when all hope is lost, 5% is something to live for. Tonight’s episode offered up a truly arresting, hypnotic image of Clarke and Lincoln astride a mutant steed galloping through the forest. I know I went on at great length last week about the discarded paper money, but something about seeing them riding the horse really struck an emotional chord for me; it not only romanticized Lincoln as a noble person, it underscored how truly alien Earth has become in so short a time.  Like us on Facebook and follow us on Twitter for all news updates related to the world of geek. And Google+, if that’s your thing!