位于极地的北极生物系统研究基地爆发神秘病毒，造成三人感染、两人死亡的惨剧。为了查明病毒的成因，防止其他一百多名来自各国的科学家遇险，美国疾病防疫控制中心在军方的要求下，派出了艾伦·法拉格特、茱莉亚·沃克、莎拉·乔丹与多琳·博伊尔等四名精英飞往北极。三人中的幸存者彼得是艾伦的哥哥，当年因一桩荒唐事导致弟弟和妻子茱莉亚离婚。一行人虽然受到畑博士的热情接待，但基地内似乎隐藏着不可告人的秘密。 而随着极度虚弱的彼得突然消失，艾伦他们的调查开始朝着不可预测的方向发展……
编剧: Steven Maeda
播出日期: 2015-01-16
运行时间: 45 min
概述: 15 months after the events at Arctic Biosystems, new CDC team with the addition of biotoxicologist Kyle Sommer respond to a potential outbreak on a Windjammer in the Northern Pacific. Their search leads them to an island occupied by a mysterious cult led by the charismatic Michael. Meanwhile, 30 years in the future, Walker arrives at the same island searching for Alan Farragut.
编剧: Timothy J. Lea
播出日期: 2015-01-23
运行时间: 45 min
概述: The CDC team continue to investigate the island; at the same time, they discover Peter's brother, Alan, is a member of Brother Michael's cult, and his warnings for them to leave the abbey fall on deaf ears.
编剧: Allison Miller
播出日期: 2015-01-30
运行时间: 45 min
概述: Peter and Jordan leave the safety of the Abbey to retrieve some specimens and discover just what’s living in the woods, meanwhile Sister Amy plots to make them leave forever.
编剧: Tiffany Greshler
播出日期: 2015-02-06
运行时间: 45 min
概述: As Michael struggles to keep the abbey under control, the CDC team moves closer toward tracking the source of the pathogen. Alan fights the urge to rejoin his team and confronts the reality about Peter’s allegiances. In the future, Walker makes a desperate attempt to escape from her delusional father, with potentially deadly consequences.
编剧: Leigh Dana Jackson
播出日期: 2015-02-13
运行时间: 45 min
概述: Michael locks Peter and Alan in a pit. Alan escapes and discovers that Kyle has a secret of his own. Agnes reveals a shocking truth to Michael, who drastically turns on her for doubting him. In the future, Caleb uncovers Walker's deception and takes matters into his own hands.
编剧: Javier Grillo-Marxuach
播出日期: 2015-02-20
运行时间: 45 min
概述: Amy creates an outbreak of the disease. Michael torments Peter in the pit. Alan, Jordan and Kyle discover the truth about the Abbey's food chain. An uprising at the Abbey threatens the safety of the uninfected. In present-day Paris, Balleseros meet an unlikely immortal.
编剧: Adria Lang
播出日期: 2015-02-27
运行时间: 45 min
概述: As Peter gains a new cellmate, Michael takes extreme action when his followers begin to mutiny.
编剧: Bobak Esfarjani
播出日期: 2015-03-06
运行时间: 45 min
概述: The Coast Guard arrives on the island to take the CDC team to another island to deal with another outbreak of the pathogen. Meanwhile, Sister Amy has to contend with Brother Michael and his plans.
编剧: Timothy J. Lea
播出日期: 2015-03-13
运行时间: 45 min
概述: Alan, Kyle and Winger search the woods for the tree with red sap that might be a cure for the pathogen.
编剧: Tiffany Greshler
播出日期: 2015-03-20
运行时间: 45 min
概述: The Abbey becomes a house of horrors as Kyle struggles with his infection and Anne begins to shape a successor to Michael.
编剧: Leigh Dana Jackson
播出日期: 2015-03-27
运行时间: 45 min
概述: The Navy prepare to implement Plan B, a final solution to ensure that the virus and everyone infected with it never make it off the island.
编剧: Javier Grillo-Marxuach
播出日期: 2015-04-03
运行时间: 45 min
概述: The uninfected are hiding in a secret bunker on the base as the CDC attempt to retrieve the canisters with the virus and the cure while the Ilaria assassins capture Hatake and force him to chose between which one of his children they will kill first.
编剧: Steven Maeda
播出日期: 2015-04-10
运行时间: 45 min
概述: Kyle rescues Dr. Sarah Jordan as Alan Farragut fights his own brother, Peter Farragut.
