在全球性的核战过后，仅存的人类躲入空间站方舟中苟延残喘。为了保存资源，控制人口，任何触犯法律的成年人都会被处以死刑。将近一百年后，空间站氧气即将耗尽，人类面临死神的威胁。为此，包括少女克拉克（Eliza Taylor-Cotter 饰）、总理之子威尔斯（Eli Goree 饰）在内的一百名少年犯被强制送往地球，他们即使危急关头的牺牲品，也是人类最后的希望。顺利抵达地球的年轻人急于摆脱方舟的束缚，克拉克则执意和几名同伴寻找供给，在此期间发现地球还有人类存在。另一方面，方舟内的政治局势波谲云诡，总理遇刺，代理总理凯恩（亨利·伊安·库斯克 Henry Ian Cusick 饰）蠢蠢欲动，人类的命运悬于一线……
编剧: Jason Rothenberg
播出日期: 2017-02-01
运行时间: 43 min
概述: Clarke and her friends struggle with how to proceed after the fate of the world is revealed.
编剧: Justine Juel Gillmer
播出日期: 2017-02-08
运行时间: 42 min
概述: The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.
编剧: Heidi Cole McAdams
播出日期: 2017-02-15
运行时间: 41 min
概述: Jaha leads Clarke and Bellamy down a road to possible salvation while tensions rise in Arkadia and Polis.
编剧: Kim Shumway
播出日期: 2017-02-22
运行时间: 42 min
概述: Continued struggles with leadership and trust in Arkadia and Polis take violent turns while Abby leads a team to a distant location hoping to find answers.
编剧: Morgan Gendel
播出日期: 2017-03-01
运行时间: 40 min
概述: Clarke makes a desperate plea with a former allied force in an attempt to avoid a war and ensure the survival of her people.
编剧: Charmaine DeGraté
播出日期: 2017-03-15
运行时间: 42 min
概述: Clarke and Roan are forced to work together when they are tasked to deliver a dangerous but crucial asset to Abby through enemy territories.
编剧: Terri Hughes
播出日期: 2017-03-22
运行时间: 42 min
概述: Clarke's arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.
编剧: Lauren Muir
播出日期: 2017-03-29
运行时间: 42 min
概述: After a disappointing discovery, Clarke and Abby question how far they're willing to go. Meanwhile, Jaha finds a lead to the mysterious Second Dawn.
编剧: Miranda Kwok
播出日期: 2017-04-26
运行时间: 42 min
概述: Jasper and Bellamy go on a quest. Meanwhile, Clarke struggles to keep the peace after word of Jaha's discovery spreads.
编剧: Wade McIntyre
播出日期: 2017-05-03
运行时间: 42 min
概述: Octavia fights in the final battle for her people's survival, but not everyone is willing to play fair.
编剧: Shawna Benson
播出日期: 2017-05-10
运行时间: 42 min
概述: Clarke faces the consequences of her fateful choice.
编剧: Wade McIntyre
播出日期: 2017-05-17
运行时间: 42 min
概述: Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.
编剧: Jason Rothenberg
播出日期: 2017-05-24
运行时间: 41 min
概述: It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.
