Kane and Abby clearly have strong feelings for one another, given their passionate kiss right before Kane left Arkadia with the others while Abby opted to stay behind to help their people. Kane will probably feel terribly guilty for leaving while Abby remained behind, since that led to Abby becoming a follower of ALIE. Will Kane be able to snap Abby out of it, getting her to fight ALIE's control as Raven briefly did?
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One of the most shocking twists this season saw Abby ingest the chip in order to save Raven. Now, it seems that she's one of ALIE's right-hand followers, much like Jaha has been all season long. Will Clarke be able to save her mother?
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Once Ontari took the chip, Polis was done for. The Grounders have a culture that places the Commander in a position of utmost power -- no one will resist if she tells them to do something and, because of that, everyone will take the chip.
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Betrayed by his own men -- yep, Pike is definitely going to die by someone's hand by the time this season is through. It's just a question of who will do the killing. Will it be Octavia? Jaha? Bellamy? Ontari? A vengeful Grounder? The list of people with a vendetta against Pike is long.
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It's ironic that ALIE, a problem created by an Arker (Becca), turned Polis into everything Pike most feared it would be. Pike was out of control, that's for sure, but he legitimately thought he was doing the best thing for his people. Now, he'll most likely die for it. The whole thing is pretty tragic.
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Oh, Kane. All he wanted more than anything was peace among his people and the Grounders. Now, he's wound up in the middle of a bigger mess than he ever could have fathomed.
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Kane looks aghast, but even the Grounders accompanying him look a bit confused. Remember, these Grounders have been monitoring the blockade to make sure Sky People didn't cross the borders that Lexa installed. They haven't been to Polis in quite a while, and they apparently have just as little idea what's going on as Kane does.
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Kane and Pike spot a probably-dead man strung up in the center of Polis. They realize very quickly that something is not quite right in the Grounder capital.
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Kane decided to accompany Pike to Polis when Pike was captured by the Grounder blockade army (thanks to Bellamy). Little did he know that Polis would look very different this time around...
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That's definitely Clarke that Bellamy is gazing at, isn't it? We already know, thanks to this episode's promo, that Bellarke has a moment, when Clarke tells Bellamy that they need each another. It's unlikely that Clarke is anywhere near ready to move on from Lexa yet, but Bellamy's feelings for Clarke are written all over his face. I mean, just look at him.
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Octavia, like Jasper, is intently looking at something the group seems to have found together. Where the heck are they? This really cool lighting appears to indicate that they're in a ramshackle structure, like a hut with holes in the wall allowing light to trickle in. Is this Luna's house, perhaps?
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Jasper is gazing up at something, either in fear or shock (or both). What kind of turn has the search for Luna taken? Or have the delinquents gotten sidetracked by something else altogether?
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The 100 Quotes

Lexa: My fight is over.
Clarke: No, I won't accept that.
Lexa: You were right, Clarke. Life is about more than just surviving.
Clarke: In peace may you leave the shore. In love may you find the next. Safe passage on your travels until our final journey on the ground... May we meet again.

The warrior doesn't mourn the dead until the war is over.

Octavia