As Priyasettles into Clarkes body, Skaikru starts to realize whats really going on in Sanctum.

In movies and TV, people who are immortal are often depicted as lonely.

Theyve outlived their friends and family and even brief acquaintances.

The 100 – “The Gospel of Josephine” – Image Number: HU605a_0679r.jpg – Pictured: Eliza Taylor as Clarke – Photo: Sergei Bachlakov/The CW – © 2019 The CW Network, LLC. All rights reserved.

Credit: Sergei Bachlakov/The CW

But in Sanctum, thats not necessarily the case.

As long as there are enough nightbloods, friends and family can live on alongside each other.

The Primeslovetheir immortality and are willing to take others lives for it.

Case in point: Josephine doesnt spend a second feeling bad about taking over Clarkes body.

Kaylee says was trying to protect Sanctum; Josie repays her by slicing open her throat.

Then she steps over her body and goes to take a shower.

Nothing seems to faze her, though.

Shes dancing to music and painting.

Russell and Simone tell her she needs to keep her identity a secret.

She says that if they ran her breeding program, there wouldnt be such a long process.

Her father reminds her that humans arent cattle and that consent is important.

When Josie walks into the tavern, she seamlessly slips into convos with Clarkes friends.

Even when Gaia speaks to her in Trigedasleng, Josie figures out how to fake it.

She then okays Madi going to school and tells Bellamy to chill out.

She doesnt really raise red flags with Clarkes people.

Although,she definitely should.

She doesnt seem to know Jordan or gasp what her own favorite flower is.

The guys give him a hard time about caring so much about a one-night stand.

Squirreled away in the medical library, Abby has no idea any of this is going on.

Shes spent all her time trying to find a way to save Kane.

Abby tells her shes read this book on eugenics.

You thought what we did in Beccas lab was bad?

That woman was a monster.

Little does she know, that woman is currently in her daughters body.

Andred flagalert: Clarke writes with her right hand.

Abby just dismisses it, though, when Jossie shows her a bug that could help with Kanes surgery.

They sneak out after him, but Josie sees and follows.

And Gaia pops in, too.

They all find themselves in a room full of skeletons, which is totally not creepy.

Gaia notices the mark of the flame on all of the skulls and thinks they must be commanders.

Clarke warns them that this is Sanctums holiest place and that they should get out.

But then Jordan finds a secret door…

They are now in the room where it happens, so to speak.

Jordan opens up their computer and finds a file that shows the first successful resurrection.

After 25 years of trying on test subjects (a.k.a.

(Oh, and Gabriel is the original Hot Doctor!

So many pieces falling into place.)

The group watching realizes that these people arent creating commanders; this tech pre-dates the flame.

They watch as this chip overwrites a young womans brain and Josie comes forth in her first resurrection.

He points out that they pose a big threat to herand to Madi.

Josie relays all of this to her parents immediately.

Madi hears about this Sanctum revelation later and isnt thrilled.

She says by staying in Sanctum, theyre condoning this behavior.

(Smart girl!)

Murphy thinks there isnt an alternative, but Bellamy says they just need to build another compound.

And anotherred flag alert:Clarke says, I agree withJohn.

Murphy says Becca wasnt a god either, and Abby proved that when she turned Clarke into a nightblood.

Obviously, Josie takes note of this.

Meanwhile, Priya walks into the tavern and Jordan publicly tries to shame her.

Bellamy follows her and speaks to her in Trigedasleng.

Josie is smart, though, and figures out he wants her to ditch her bodyguard, Jade.

They duck into a private area, where Bellamy finally, finally,finallyrealizes something is wrong.

But so does Josie.

He tells them not to fight or theyll die faster.

Of course, O fights like crazy and sinks down fast.

Diyoza says she reminds her of herself when she was younger.

She says that Xavier wont let them die, that hes watching from nearby.

And he is … he says he just wants to know how many nightbloods there are in their group.

But before they can give anything away, a temporal flare begins.

Xavier quickly pulls Diyoza out, but they cant get Octavia in time.

She goes under the quicksand just as the light hits where she is.

Its burned out the forest and turned her sand into … glass, maybe?

Anyway, Diyoza rushes back, beats at the glass-like-stuff and is able to yank Octavia out.

Only problem is O now has the hand of a 90-year-old woman.

Things are not going great for the Blake siblings today.

Abby says its not about replacing the pills, its about saving the one person who was good.

He never gave in during the Dark Years and she thinks he deserves to live.

Josie knows Abby is the key to Sanctums survival, but thats not the person she needs right now.

Someone else is in Clarkes body.

Before you freak out, she says to him while posing a single question.

How would you like to be immortal, too?

Im listening, says John Murphy.