11. Ashes to Ashes

Complete story — includes the ending

Using Madi's bone marrow, Ryker makes Echo into a Nightblood to become the next host for Simone. Echo tries to convince Ryker to let her go, recognizing that he is conflicted. Echo shares her backstory with Ryker, revealing that she is actually Echo's best friend Ash who was forced to kill the real Echo as a child and take her place. Gaia and Miller manage to escape and rescue Echo before she can be mind-wiped. Echo then kills Ryker. At the same time, Clarke and the others are captured by the Children of Gabriel and work to come up with a plan to defeat the Primes once and for all. They come up with a way to simulate a Red Sun eclipse in order to cause an evacuation of Sanctum. After Jade arrives with Murphy, Clarke poses as Josephine in order to infiltrate Sanctum and take down the radiation shield. Clarke is able to fool both Russell and Madi, but Madi's anger at Clarke's supposed death causes her to fall fully under the influence of the Dark Commander and agree to his plans.