Gaia: "Good question. He turned off the Stone. Before the Bridge closed, we went through... landing here. (in flashback) No. How?"
Disciple (in flashback): "The closing Bridge defaults to the planetary origin of our DNA. Your journey ends here, too."
Gaia (voiceover): "He would not stop talking while we fought. Said when you're caught in a closing Bridge, it defaults to the planetary origin of your DNA. Earth."
Clarke Griffin: "Madi's sketchbook, he had it and he knew that she still has the memories of the Commander. She would never be safe. I begged him to stop. I tried to get the book back, but he... I tried everything, I promise. I tried. I'm so sorry."
Octavia Blake: "I understand. So would the old Bellamy. The one that would do anything for his baby sister and the people he loved."
Echo: "We lost him a long time ago. He needed all this chaos to make sense, all the violence, all the people we've killed. He couldn't accept that it's all meaningless. Cadogan gave him meaning, and that meaning is what killed him... not you."
John Murphy: "That's it I'm out of here. Where's the funky ball with the green light?"
Sheidheda: "No... but I know who did. Oh. Incredible."
Bill Cadogan: "Yes. Our medicine is incredible. So is our ability to dig through your memories, but I'd rather save the time. What do you want?"
Sheidheda: "First, I'll need assurances. Sanctum is mine. We destroy the Stone. You people never come back."
Bill Cadogan: "The Stones are indestructible, but, yes, you can have Sanctum, not that it'll matter. I don't think you comprehend what this means."
Sheidheda: "It means someone has memories that are not their own, memories that you require in order to start a war with whoever made the Stones, a war I want no part of. One planet will be fine, thank you very much."
Bill Cadogan: "Not a war, the Last War, and you'll be part of it whether you like it or not."
Sheidheda: "That was before I knew what was at stake. Although transcend or die has a nice ring to it, it really isn't much of a choice, is it? I've been in the child's head. I know her better than she knows herself. How well does your strike team know her? I'll get her back, but then our deal still stands."
John Murphy: "Clarke is wrong. Some of those people are from here, Raven, Wonkru, Eligius Prisoners. Earth is their home, too. Let me ask you something. When you let Hatch and his buddies die, was that just to save your friends?"
Niylah: "And you said you were tired but you're still up so... Why are you still up, Echo?"
Echo: "Not Echo. Ash. My name is Ash. Don't worry, I never told Bellamy either. 6 years, I never told him my real name. Every day I'd wake up and think to myself today's the day. But no. When I finally told someone, it was to save my life. Echo was a coward."
Echo: "I wanted him to see me as this person I've become, not pity me for who I was or what I went through."
Niylah: "He did. He wouldn't have stayed with you that long if he couldn't see the real you, Echo. I mean Ash. You're not the only one with secrets. I was named for Queen Nia."
Niylah: "My father's side. My mother was Azgeda. That's why we lived so far out in the woods. So no one would see her scars. We are who we choose to be and we don't owe anyone our pain."
John Murphy: "I'm right here and also I'm not a hero, I just think the people on Sanctum deserve to live on a planet that doesn't eat them or occasionally drive them insane."
John Murphy: "Hey. We haven't, um, properly met, I am..."
John Murphy: "Ok. I was his favorite though, wasn't I Jordan?"
Sheidheda: "Hello, Madi. It seems you're the key to the transcendence of the human race. They sent me to bring you back, but, you see, I don't want to transcend. I want to reign. They gave me a choice -- (holds up a vial of nano-tags) use these to bring you back peacefully or this... (holds up a tagging device) if you wouldn't go willingly. I prefer Option 3 -- (extends his suit's blade) to gut you like a pig."
Gaia is revealed to have been sent to Earth with the Disciple that had abducted her. She was only there for a few days and the others since that morning.
Earth is revealed to have regenerated from the Second Nuclear Apocalypse. A massive forest stands where Polis used to be with the only sign remaining of the former Grounder capital being a few fallen rocks over the bunker entrance and the overgrown base of the Polis tower nearby, visible briefly when Clarke's group emerges from the bunker.
It appears that Earth and Sanctum run on the same time as Gaia was only there for a few days and the others since that morning, matching when they went through the Anomaly.
Earth's Anomaly Stone is revealed to be hidden in the bunker, but Clarke destroys the Disciple helmet that can lead them to it. Though they now have Sheidheda's it is damaged and unable to display the Stone's location.