来自纽约的前联邦检察官Ted Black如今改头换面获得新生，在洛杉矶代理最有权有势的客户。而他的律师事务所面临危机，为了生存，Ted不得不去接受自己整个职业生涯都鄙视的一个角色。他的周围有一群杰出的人物，而他们对于Ted的和对彼此的忠诚都在受到考验，又情不自禁把工作和私人生活混在了一起。这一切发生的同时，多年前的事件逐渐揭开，让Ted开始远离他所热爱的一切人和事物。
Officer John Cooper returns to duty after recovering from back surgery and meets his new partner, Officer Jessica Tang, a tough and disciplined cop with her own set of baggage from working the streets. Lydia, whose new partner is Ruben Robinson, can't seem to escape helping a former CI who won't stay in safety. Ben, Sammy and Dewey chase an armed man into an elementary school, while Ben bumps heads with an intense street cop whose cynical attitude is affecting their work.
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.
Barnaby and DS Ben Jones investigate the death of Simon Bright who is found dead inside an old World War II vintage Humber parked at an abandoned airfield. From all appearances, the death appears to be a suicide, but the pathologist determines that the man suffered a severe blow to the dead and may in fact have been unconscious when he died of carbon monoxide poisoning. Simon Bright's girlfriend, Laura Sharp, is nowhere to be found, but the death of the aging village Lothario and the attempted murder of another of her friends narrows the list of possible murderers somewhat. Barnaby is convinced that one of Laura's ex-lovers is responsible but given her rather active life, the question becomes which one?
故事开始于遥远的1642年，士兵约翰（尼可拉·科斯特-瓦尔道 Nikolaj Coster-Waldau 饰）跟随着军队在荷兰驻扎，在此期间，他意外地救下了一位印第安女郎，为了报答约翰的救命之恩，女郎在他的身上施下了神秘的魔法，那就是约翰将拥有无止境的青春和生命，直到他遇见命中注定的爱情。 就这样，漫长的三百年过去了，在此期间，约翰可谓是目睹了整个世界的巨变。漫长的生命带来的是无尽的孤独，尽管也曾有过美女相伴，但那个约翰命中注定的爱情，似乎还未出现。如今，约翰是一名警察，在一次追捕嫌犯的过程中，约翰竟然心脏病突发而亡，复活之后，心中异样的情感告诉约翰，他几百年来想要寻找的那个人，就在当时的人群之中。
