Okay, so while I'm not 100% sure yet, it certainly seems like we somehow made it out of this episode without any bloodshed. Although, I have no idea how. Between, Roan's army and Sky People with guns, and the giant explosion at the ship, there should have been so much more death.
Illian carries Octavia into the Arkadia in order to get access to the ship. And, as revenge for bringing Allie, he blows up the ship. (You know, the one that Clarke just managed to use as a bargaining chip so that Roan's army wouldn't slaughter them? Yeah, that ship).
Raven apparently realizes she's got leftover Allie programing in her brain. She and Abby (who also some Allie left in her) figure out that they can go into space and make the Nightblood serum. However, Raven has suffered a stroke and her going up is risky, but she manages to talk Abby into letting her go.
And speaking of Abby, she's now starting to get side effects from her reverse engineering of Allie's chip as well. She's hallucinating, and generally, things are not looking good. She's snippy and short.
I mean, we've at least got a viable plan, but I don't know how well the rest of the clans are going to take watching the rocket head for space. Do we think they'll assume the Sky People are leaving them to die and heading off to save themselves?