Luna comforts and calms down Raven after Raven breaks down.

Jackson and Abby broke the news to Raven that she was showing signs of brain damage after the EMP was used to remove ALIE's chip. But Raven is determined to keep pushing herself in order to find a way to create more nightblood. Will her determination doom her to an early death?

Good news: It seems that Niylah is sticking around with the Sky People, now that Arkadia has been destroyed. She was absent for most of latter half of The 100 Season 3.

What in the heck could Monty and Jaha have to talk about? This conversation looks serious and tense.

Jaha came up with the plan to hold a lottery for the available spots in Arkadia. Will he be able to come up with a new plan, now that Arkadia is no longer an option?

Monty looks plenty uncertain here. Maybe he's feeling the pressure of coming up with another viable survival option, given that fortifying now-destroyed Arkadia against the radiation was his idea originally.

Octavia is holding a gun to Ilian's head, presumably wanting to make him pay for the destruction of Arkadia. Will Kane be able to talk her down?

Ilian destroyed Arkadia, the only known surefire safe haven from the radiation. Understandably, people will want him to pay.

Bellamy, Clarke, and Roan are working together once again. Now that recreating a nightblood serum is the only way to save everyone, cooperation is more important than ever.

These two shaky allies came to an uneasy agreement at the end of "The Tinder Box," but it ultimately wound up being a moot point – Arkadia was destroyed anyway.