97 years after a devastating nuclear war wiped out almost all life on Earth, humankind is living in space, residing in twelve space stations. The space stations banded together to form a single massive station named “The Ark”, where about 2,400 people live. Resources are scarce and all crimes no matter their nature or severity are punishable by death (“floating”) unless the perpetrator is under 18 years of age. After the Ark’s life support systems are found to be critically failing, one hundred juvenile prisoners are declared “expendable” and sent to the surface in a last ditch attempt to determine if Earth is habitable again. The teens arrive on a beautiful planet they’ve only seen from space. Confronting the dangers of this rugged new world, they struggle to form a tentative community. However they discover that not all humanity was wiped out. There are people on Earth who survived the war, called “grounders” by the 100. The teens quickly discover they are not welcome by the hostile grounders and must band together in order to survive.

6.10 Matryoshka

Air Date: July 16, 2019

With the help of a reluctant Ryker, Echo and Gaia foment a rebellion against the Primes, leading to a man assassinating Simone. In response, Russell prepares to burn everyone at the stake, but is convinced that the Earth people can help him create new Nightbloods through bone marrow transplants. With Madi falling further under the Dark Commander’s influence, Raven plots to erase his mind for good with the help of Gaia. Their condition deteriorating, Clarke and Josephine work together to survive before being found by Gabriel and Octavia. Though Gabriel removes the Mind Drive, Josephine remains inside of Clarke’s mind using A.L.I.E.’s neural mesh and tries to kill Clarke. With Bellamy urging her to fight, Clarke destroys Josephine for good and is reunited with her friends at long last.