Well. That was a jam-packed season finale. After a lot of waiting around and a proelium interruptum, The 100 gave us plenty of bloody conflict: a sea monster, an opportunity for genocide — and the truth behind the mystery of Earth's nuclear cataclysm.
Last week, Lexa betrayed the Arkers by making a deal with Mount Weather: Mount Weather releases the Grounders and Lexa agrees to withdraw her troops. This week, in "Blood Must Have Blood, Part 2," Clarke and the rest of the Arkers must rescue their people without the Grounders' help. And it's not just the remnants of the 47 who are held captive under Mount Weather; Cage's people have captured a number of other Arkers, including Raven, Abby, and Kane.
Kane, ever the diplomat, tries to convince the Undergrounders that a compromise is the way to go. With Abby's help, they can "cure" all the Undergrounders of their vulnerability to radiation. But the Undergrounders have already committed to their slaughter. Aside from the members of the resistance, they've killed their own people and drilled Arkers to death in order to reclaim the surface.
Once again, this episode invites us to look at the parallels between Cage and Clarke and the decisions that they make on behalf of their people. Cage has made his people complicit in his crimes, forcing them to turn not just on their fellow humans, but also on each other in order to achieve Cage's ultimate goal. Clarke, on the other hand, keeps the blood on her own hands. She went into Mount Weather with certain ideals — no civilians killed, and certainly no children. But when push comes to shove, she shoots Dante Wallace (who was certainly not a heroic man, but one whose cruelty did not extend to the Arkers) and pulls the switch that reverses Mount Weather's filtration system, killing all the Undergrounders who didn't receive the cure.
That includes Maya. I knew there was no way she was going to survive this conflict, but it's still sad that she had to go.
Bellamy tries to take on a small measure of Clarke's guilt by placing his hand with hers on that deadly lever, but even though she wins the day — and even her mother's admiration — Clarke knows she can't return to Camp Jaha. She has taken on the role of Sin Eater, and in her mind, that person has to live apart from the relatively innocent. She can stand about and chant "Blood must have blood," but her people aren't Grounders and she doesn't want them to be.
While Clarke was busy committing war crimes, Lincoln at least got a satisfying bit of revenge. Cage thought he could manipulate Lincoln the way he's always manipulating outsiders, using drugs and science to get his way. But Lincoln is far stronger than Cage could have imagined, not only resisting the addictive substance, but pumping it into Cage's veins. (And not before lopping off Cage's hand. Nice.)
Even amidst the big moments at Mount Weather, Thelonious and Murphy get the most interesting storylines of the night. They're still following that drone to the legendary City of Light, and everything is going well until the sea monster shows up.
Jaha is still in his religious frenzy, and he seems to think that he and Murphy are destined to reach the City of Light. Everyone else is disposable, especially if Jaha can lead the rest of the Arkers to the city. You freeze up in the middle of a sea monster attack? You're out of the boat and into the sea monsters mouth.
Also, why are there sea monsters? This is even weirder than the gorilla attack.
Well, it might have something to do with what Jaha and Murphy each find. Murphy is wounded, and he tells Jaha to keep following the drone without him. But even stranded on the shore, Murphy finds something pretty great. After uncovering a solar panel, he hears the blaring of Warren Zevon's "Werewolves of London" and discovers a hidden bunker, one stocked with rations and booze. It also has a video of a fellow sobbing over some female entity who got a hold of the launch codes and went mad. The fellow shoots himself on camera, leaving Murphy stunned and wondering who "she" might be.
We the audience get the answer pretty quickly. Jaha follows the drones to the mansion, where a beautiful woman in a red dress greets him by name. Jaha quickly realizes that she's an AI, one who wants Jaha to repair a fallen bomb.
Yes, thank you, The 100. This is a great note to end on. The conflict with Mount Weather was an interesting chapter for the Arkers, but I've been itching to see this post-apocalyptic world opened up a bit. And it looks like we're going to get to see more of the world — and its past — next season.