Don't believe what you see. In the terrifying world of deepfake technology, just who is pulling the strings? A devastating attack puts new boss of SO15 Rachel Carey at the heart of a conspiracy more deadly than anything she’s encountered before. 眼见不一定为实。在令人恐惧的深度伪造（Deepfake）技术世界里，究竟是谁在幕后操纵一切？ 一场毁灭性的袭击让 SO15 的新任负责人 Rachel Carey 陷入了一场比她以往遇到的任何事情都更加致命的阴谋之中。

《国土安全》第五季的故事将发生在柏林，时间是前一季的两年半之后，Carrie Mathison不再是情报员，而是为一家私营安保企业工作。新一季将在德国柏林拍摄，并定于2015年10月4日播出。 The fifth season will take place two and a half years after the previous season and will be set in Berlin with Carrie Mathison no longer an intelligence officer and working for a private security firm. The season will film in Berlin, Germany, and is scheduled to premiere on October 4, 2015.

Carrie's career at the CIA takes off when she becomes an overseas station chief in a highly volatile region, but every drone strike and tactical raid comes at a cost and she quickly learns the true price of power. Saul fights to stay in the intelligence game.

Carrie goes to extraordinary lengths to solve the latest crisis at the CIA while dealing with a deeply personal secret. Brody struggles to survive. Saul must walk a tightrope and play many opposing sides to keep his job at the CIA and try to revive his troubled marriage. Quinn has a crisis of faith.

在2003年入侵伊拉克的前夜，波特带领一组特种部队参与解救人质的行动，因不忍而放过持枪的当地童兵，结果同队的伙伴被杀害，连他和卡林森都受伤且损失惨重。七年后，波特得以重回战场，作出补偿。