TV commentary:
The 100- Heh, its hard not to think they're purposely thumbing their nose at Bellamy fans.
So they make it a point to say no one who dies will be able to transcend. And he doesn't even to get show up as someone the mysterious alien takes the form of! And to add insult to injury, the form they take for Clarke is Lexa and when Clarke tells the aliens the suffering she's faced, Lexa is her love, and Bellamy is her best friend. So it does seem like they're purposely messing with them.
Anyways, heh, Clarke massacres her way through to the portal room, where she sees Cadogan has already gone in to take the test. Sure enough, the alien is in middle of interviewing him when... Clarke shoots him in the head and then empties the clip into his corpse for good measure. Needless to say, that does not bode well for humanity.
Meanwhile, while Jackson does get Emori back to Sanctum's medical center, he is unable to save Emori, so Murphy installs her mind drive into himself so he can live out the rest of his short life with her until his mind gets fried.
Anyways, the gang leads the Grounders and convicts to confront the Bardo army, but only as a distraction so Echo and Raven can sneak in and meet up with Clarke and Octavia (not knowing its already too late) So Raven makes it to the portal room, where Clarke breaks the bad news. As she leaves to be with Madi, Raven goes through the portal, and tries to convince the aliens (who take the form of Abby, which the aliens find interesting that Raven's mind picked that instead of her actual mother) not to kill them.
The aliens are unfazed, particularly when they bring Raven to see the standoff. No one is fighting, until Russheda starts shooting to start shit. Levitt tries to stop the fighting, and gets shot by Russheda for his trouble. Octavia rushes in to save him, along with Echo, who also gets shot in the process.
So as they lay dying, Indra does manage to get one of the convict's super cannons and vaporizes Russheda before he can sway the Grounders into fighting. Which gives Octavia the opportunity to convince both sides to lay down arms, thus convincing the aliens to transcend humanity.
Since Emori is still alive in the mind drive, and Echo and Levitt manage to hold on until this point, they survive long enough to transcend. Everyone gets to transcend but Clarke, who has to suffer some consequences for killing Cadogan in the middle of his test. Madi fights off transcending, not wanting to let Clarke be alone, but Clarke tells her to go, and so she transcends.
So Clarke takes the portal to Sanctum, where Picasso is still around (so pets don't transcend? They just get abandoned?) and she goes back to Earth. Picasso runs off and seemingly disappears, when the alien Lexa shows up. She informs Clarke everyone is safe and happy, like Madi, who didn't return because she knows Clarke wouldn't want her to go back.
Which Clarke realizes means people can choose to come back. And the rest of the gang did, despite it meaning they can never re-transcend or have offspring. They just live the rest of their lives on Earth until they die, which I know they care about Clarke, but the number of people who go back down is weird: Octavia, Levitt, Echo, Raven, Murphy, Emori, Jackson, Miller, Indra, Gaia, Hope, Jordan and Niylah. Like some of these are couples who are sacrificing eternity forever just so Clarke won't feel alone?