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地球百子
The fight to survive has torn The 100 apart, turned them against each other, and taken the lives of their closest friends. Last season, our heroes found themselves at the epicenter of both the Grounder world and the struggle for Arkadia’s soul. Despite their best efforts, war appeared unavoidable, until a new, even more dangerous threat – one that had been quietly rising all along – exploded to the surface: ALIE, the A.I. that ended the world, offered relief from pain and eternal life in the “City of Light.” But as her ranks grew, it quickly became clear that she was building an army dedicated to controlling all sentient life on Earth. This was no longer a battle between warring factions; it was a fight for humanity itself. Now, a hard truth lands on the shoulders of those who remain. Will they go quietly into the night, or will they find hope and faith in each other, as they face their darkest chapter yet?
克拉克被困在波利斯，并被敌对的阿兹哥达人包围，于是制定了一个冒险的计划。另一方面，雷文发现了他们新面临的严重威胁。
罗恩冒险为天空人的秘密工作争取时间，贝拉米和克拉克面临着艰难的选择 — 这或将危及他们的生命。
辐射不断逼近，亚哈领着克拉克和贝拉米进行了一次机会渺茫的任务，想要找到一个避难所。罗恩派奥克塔维亚去取回被盗的火焰。
克拉克的谎言引起了一场反叛。艾比带队冒险寻找夜血。部落间的联盟破裂后，奥克塔维亚面临着一场对决。
联盟破裂后，罗恩和他的阿兹哥达军队向天空人的基地进军。为了避免全面战争，克拉克只得孤注一掷。
为了支援雷文的夜血任务，克拉克和罗恩带队运送宝贵的燃料。奥克塔维亚意识到了自己扭曲的复仇心。
天降致命黑雨，艾比寻找着治疗辐射病的最后希望，奥克塔维亚联系了伊莲，贝拉米则面临着生死攸关的决定。
时间所剩无几，克拉克为了寻找解药孤注一掷。凯恩和亚哈在寻找秘密掩体时，遭遇了一个末日邪教的晦涩谜题。
背叛和仇恨促使部落们展开了致命的决战。奥克塔维亚努力想要放弃自己暴力的过去。雷文选择了她的命运。
为了控制地堡，奥克塔维亚、罗恩和来自各个部落的战士们在一场仪式性的战斗中拼死搏斗，但并非每个人都打算遵守规则。
奥克塔维亚拖住部落争取时间，而贝拉米不接受克拉克关于地堡的计划。蒙蒂试图拯救贾斯伯。雷文发现了意外的希望。
为了拯救雷文，克拉克和贝拉米带队执行了一个危险的任务。凯恩和亚哈在选择幸存者问题上发生争执。艾比做出了一个事关命运的决定。
核末日来临时，奥克塔维亚担任了地堡的指挥。为免遭灭顶之灾，雷文带着克拉克的滞留队伍在最后一刻奋力逃生。
