100 years in the future, when the Earth has been abandoned due to radioactivity, the last surviving humans live on an ark orbiting the planet — but the ark won't last forever. So the repressive regime picks 100 expendable juvenile delinquents to send down to Earth to see if the planet is still habitable.
Writer: Jason Rothenberg
Air date: 2020-05-20
Runtime: 41 min
Overview: Clarke and her friends attempt to rebuild Sanctum as a new threat rises in the woods.
Writer: Jeff Vlaming
Air date: 2020-05-27
Runtime: 42 min
Overview: Echo and Gabriel learn more about Hope and her mysterious past.
Writer: Kim Shumway
Air date: 2020-06-03
Runtime: 42 min
Overview: Raven faces an unexpected threat. Clarke must keep the peace among opposing factions in Sanctum.
Writer: Sean Crouch
Air date: 2020-06-10
Runtime: 42 min
Overview: Mysterious outsiders arrive with news of Clarke's missing people.
Writer: Drew Lindo
Air date: 2020-06-17
Runtime: 42 min
Overview: Octavia gets to know a whole new world. Meanwhile, Murphy and Emori play make believe.
Writer: Erica Meredith
Air date: 2020-06-24
Runtime: 42 min
Overview: Clarke and her friends find themselves on a planet that is not what it seems.
Writer: Miranda Kwok
Air date: 2020-07-01
Runtime: 41 min
Overview: Emori tries to heal Sanctum's old familial wounds while Echo, Octavia and Diyoza struggle with new ones.
Writer: Jason Rothenberg
Air date: 2020-07-08
Runtime: 41 min
Overview: Clarke confronts a new adversary. A surprising connection takes us back to the past and to the nuclear apocalypse that destroyed the Earth.
Writer: Alyssa Clark
Air date: 2020-07-15
Runtime: 41 min
Overview: Murphy and Indra must defuse a tense situation. Old friends make new allegiances.
Writer: Nikki Goldwaser
Air date: 2020-08-05
Runtime: 42 min
Overview: Sheidheda makes his move. A Disciple goes rogue.
Writer: Jeff Vlaming
Air date: 2020-08-12
Runtime: 42 min
Overview: Where in the universe is Bellamy Blake?
Writer: Blythe Ann Johnson
Air date: 2020-08-19
Runtime: 42 min
Overview: It's a new day in Sanctum. Clarke, Octavia, Raven and Echo struggle with a new foe.
Air date: 2020-09-09
Runtime: 41 min
Overview: The red sun derails Clarke's plans.
Writer: Sean Crouch
Air date: 2020-09-16
Runtime: 42 min
Overview: Clarke and her friends reckon with all that has happened only to find an unexpected threat looming.
Writer: Kim Shumway
Air date: 2020-09-23
Runtime: 42 min
Overview: Clarke and Octavia mount a desperate rescue mission as the Disciples close in on what they want.
Writer: Jason Rothenberg
Air date: 2020-09-30
Runtime: 43 min
Overview: After all the fighting and loss, Clarke and her friends have reached the final battle. But is humanity worthy of something greater?
