After putting up a valiant fight on last week's The 100, Raven (Lindsey Morgan) gave herself over to A.L.I.E. (Erica Cerra) completely. But never one to give up on her people, Clarke (Eliza Taylor) will lead the fight for Raven's soul in Thursday'sepisode while the heartless A.I. does everything she can to protect her secrets - even if it means sacrificing Raven.

TVGuide.com spoke with Morgan about the new dangers Raven is facing, what A.L.I.E.'s real plan is and more. Check out everything she revealed in the interview below.

How did you feel when you learned Raven would become one of A.L.I.E.'s pod people?

Lindsey Morgan: I had an inkling of knowledge to it in the beginning of the season when Jason [Rothenberg] was pitching this whole Matrix scenario with the City of Light and how Raven would be integral to it. It was very exciting, because I feel like the show hadn't been that science-fiction-y. I was really interested in doing a really science fiction-based story because it's something I feel like I hadn't done yet.

Raven's kind of a villain right now. Raven's always trying to do the best she can for the group. Aside from the couple of mistakes she's made, she's always been a protagonist. So it was really interesting brutally fighting against my castmates, against characters and people I've spent three years constantly trying to save. I was really interested in that, and also interested in the acting exercise of, "what do you do when you're mind-controlled by a supercomputer?" Like, that's never happened to me before in life, so I love the challenge it brings.

What state is Raven in when we see her next? And what does her time in captivity look like?

Morgan: Raven held out as long as she could, but she finally fully submitted to A.L.I.E. and with that comes compete and utter cognitive control over Raven's mind, Raven's body, everything she does. Raven's no longer there. It's A.L.I.E. that's pulling the strings in her mind. So it's really interesting to see Raven under full control of somebody else, and ultimately someone who is the adversary to all her friends. So you see A.L.I.E. working through the filter of Raven, and A.L.I.E. looks at Jasper or Bellamy, someone that's holding her captive, and A.L.I.E. says, "enemy." And Raven looks at them and all she sees is, "enemy." She no longer sees Jasper or Bellamy. She doesn't have any recollection of who these people are until it's beneficial for A.L.I.E. to know.

Jasper (Devon Bostick) doesn't understand everything the chip does. He doesn't understand the extent to which Raven has been compromised. .... And now that Arkadia has fallen, he's running for his life and he took Raven with him trying to save her. And whatever Raven sees, whatever Raven hears, A.L.I.E. hears and she collects that information. He blindfolded her and is trying to take her to some remote location. ... But it doesn't really matter where Jasper takes her geographically, because A.L.I.E.'s embedded in her brain.

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Clarke has the A.I. that A.L.I.E. has been after, and now she's brought it straight to her in a way. How will the Flame factor into the episode?

Morgan: The Flame literally raises the stakes from a 7 to a 15. Everything is culminating in this point. And now that A.L.I.E. has taken Arkadia, A.L.I.E.'s that much stronger. The more minds she has, the more influence and power she has. She's stronger than ever. Her army's at full capacity, basically. And now she has her secret weapon, her right-hand pod person, Raven, in the room with the very thing she has been searching for for this entire season. So A.L.I.E. is so close to victory she can taste it. And the Hundred, the kids, are so screwed. They don't even know, but if A.L.I.E. gets the Flame, they're done. The Hundred will be extinct, essentially, when she takes them all and erases their minds. So everything is at the boiling point as far as what's going to happen.

A.L.I.E. said that conquering Arkadia was only Stage 1. What can you say about A.L.I.E.'s main goal?

Morgan: A.L.I.E. doesn't think she's bad. A.L.I.E. doesn't think she's a villain. A.L.I.E.'s just doing what she's made to do and what Becca created her to do, and that's save the human race. And in A.L.I.E.'s mind, saving the human race means enlisting them into the City of Light. Because she has factored into her A.L.I.E. mind that what's wrong with humanity is pain, because pain ultimately causes humanity to be violent against one another, kill one another, get revenge. So once she factors out pain in the equation, then humans are peaceful. ... However, what A.L.I.E. doesn't understand is that pain also makes us human, and she's stripping away the humanity and mortality of us. And because she is a computer, she can only do what she's created to do. So she'll literally stop at nothing to finish what her programming is created to do. So that's A.L.I.E.'s ultimate end goal. In a way, she's trying to make the world a better place. She's trying to save humanity, but just going about it the wrong way.

The photos released from the episode reveal Niylah (Jessica Harmon) returns this week. What can you reveal about her return and whether or not she brought that wristband with her? Morgan: I think that's interesting because as big as our world is now - especially with characters like Niylah and Polis and everything - everyone's still essential to the ultimate story. So Niylah being in the premiere with the wristband obviously is why she's coming into this episode. If you saw [last week's episode], Raven had the idea of using the wristbands as a way to disconnect from A.L.I.E. ... But also, Niylah has had her own personal journey through everything that's happened while everyone else was gone. So you get to see what Niylah's been through and how the Hundred and Skaikru have affected her and her life. Every choice and action have a consequence, and it's not just affected our core characters. It's affecting our entire world and it's interesting to see that all play out.

The 100 airs Thursdays at 10/9c on The CW.

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