Whats that saying about a revolution only needing a spark?

Inside the walls, Madi is strapped to an operating table and getting her bone marrow extracted.

She may be weak physically, but she is seething with rage and Sheidheda inside her.

Eliza Taylor

Credit: Sergei Bachlakov/The CW

He wants her to kill everyone who gets in their way so you can get revenge forClarke.

And we know Clarke is not dead.

Gabriel thinks they should put the mind drive back into Clarke and let Russell think its his daughter.

Bellamy thinks this is too dangerous, though.

While Clarke gets to know Gabriel, we get to know him a bit better ourselves.

But he doesnt want to kill the Primes and everyone inside, he wants to save them.

What did he do to deserve that punishment, you ask?

What a gem that Josie was!

After continued aggression from Bellamy, Octavia finally asks to talk to him outside the tent.

When she exits, Gabriel explains that Octavia has changed.

She went through the anomaly, the greatest mystery of Sanctum, and came back out.

Gabriel exits the tent and tells his followers, The old man is dead, so is Xavier.

They are not pleased especially Xaviers sister, Lyla, who just happens to be there.

Gabriel has been lying to them for TEN YEARS!

See, Bellamy has hatched his own scheme in this short time.

She says she knows why the thing spit her out: It was for you.

Without you as my compass, I was lost, she explains.

I couldnt find my way out of the dark.

Bellamy takes this in and says he knows shes his sister, but youre not my responsibility not anymore.

And I, for one, am accepting that as a baby step.

Thats when Clarke realizes shes facing Mount Weather all over again.

And this also means that Josephine will have to enter Sanctum and do it herself.

Still in Sanctum prison, Miller and Gaia are trying to escape.

Murphy is standing around offering no help when Jade comes in and says that hes wanted in the palace.

Hes taken in where Russell is torturing Echo to learn who else knows the truth aside from Tai.

And because Echo spits back venom at Murphy, Russell believes hes still on his side.

He wants him to go with Jade and bring back Josie.

If he doesnt succeed, Russell will kill Emori.

In the machine shop, Echo asks Ryker to stop and get on the right side of this fight.

But he made his part in the revolution a little one, and now hes done.

He turns her into a nightblood with no qualms at all.

Were treated to an Echo flashback, with special guest Queen Nia (Brenda Strong).

Echo cant do it.

So the queen gives her one more chance: Kill her friend, Ash, or theyll both die.

The queen says Sangedakru is expecting a girl named Echo, so Ash became the Echo we know today.

Ryker says hes sorry that happened to her, but that doesnt change anything.

Killing you would haunt me, he says, but so would not killing you.

And just then Gaia and Miller who escaped from Sanctum jail burst in.

Echo stabs Ryker in the stomach.

So long, Hot Prime.

He wants to do it the way that probably kills lots of people and doesnt put Clarke in danger.

What would Monty do?

You know your plan is bad when even Blodreina isnt on your side.

Outside, theres a commotion.

Murphy and Jade are there to collect Josephine.

After collecting Josie, Jade wants to shoot Layla, but Clarke says, This one is mine.

Jade exits the tent and Clarke shoots the ground.

Before untying Bellamy, Clarke escapes with her Sanctum guard.

Layla is clearly very confused, but hopefully now on Team Clarke.

Two more episodes left.

Can Clarke stop this fight without starting a war?

And will they be able to get to Madi in time before she starts her own war?

And can the killing of Hot People in Sanctum stop?

Only time will tell.