新季剧情讲述Synth的意识被全面觉醒的一年后，时尚有所分裂的英国正处于人类及Synth之间那不太安宁的和平里，时尚然而当一个Synth组成的社区建立起来时，两方希望达致的稳定将受到威胁。Synth一行人Mia﹑Niska及Max（Gemma Chan﹑Emily Berrington及Ivanno Jeremiah饰演）将继续为生存而奋战；而人类方Joe﹑Laura，他们的孩子Mattie﹑Toby与Sophie（Tom Goodman-Hill﹑Katherine Parkinson﹑Lucy Carless﹑Theo Stevenson及Pixie Davies饰）则在努力接受这全新环境。
回复 :一个自信满满、从不后悔、身型丰满的家庭主妇，在一个云集各位所谓“完美”母亲的富人镇Westport，抚养自己三个缺点重重孩子的故事。
回复 :A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.
回复 :CBS于2012年3月14日宣布续订第四季。