Three months after the Frobisher settlement, Patty is concentrating on establishing a charitable foundation when an old boyfriend, named Daniel Purcell, contacts her and entangles her in a new case involving corporate fraud and greed. Meanwhile, Ellen continues working with the FBI to destroy Patty, but she becomes more rash and impatient as she continues to set up her appearances to hide her rage behind fabricated grief in the wake of David's murder. Elsewhere, Arthur Frobisher is revealed to have survived the assassination attempt and is recovering in seclusion as he plots his next move against all the people whom he felt wronged him.

　　位于三岛市的中国潜艇基地正在总装一艘新型号潜艇，两月后必须交付海军试航，D国情报机构通过先进的技术手段，证实了中国新型号潜艇采用尖端的多元合金材料，使噪声低于海洋背景噪声，极大提高了潜艇的威慑力。D国情报机构通过网络和人力渗入，企图窃取R-4材料的机密，以便及时研究防御机制、采取应对措施。然而，就在他们证实中国潜艇降噪技术的同时，也暴露了三岛市的潜伏间谍鲨鱼一号。以布雷尔为首的D国情报人员与我海军保卫部门和三岛市国安局组建的军地联合专案组，展开了紧张激烈的对决。最终，这些人民的战士用热血和生命保卫了潜艇的机密安全，坚定地履行了国家安全和军队保卫干部的神圣使命，谱写了一曲忠于党、忠于国家、忠于人民的英雄赞歌。

　　亚洲某大城市...... 高度设防的监狱中，被囚禁的犯罪集团首领越狱。因谋杀被判刑的前情报科主管江宁（吴启华饰）在事件中被挟持作人质，被逼随首领逃离监狱。
　　负责追捕首领的保安科行动组主管韦明（宣萱饰）为了完成任务，不惜向特警下令射杀所有参与越狱的囚犯，江宁惊见所有人被杀害的同时，他同样被冷血地射杀.. ....
　　江宁醒来后，已身在保安科的秘密基地，他根本没有被杀。韦明的真正目的，是要安排江宁从此在世上消失。为著各种不方便公开的原因，地区各国面对好些难题急需解决，决定成立由江宁带领的组织「隐世者」，进行一连串非常任务......
　　江宁精明干练，智勇双全，善于掌握手下的特长，入狱前在情报科曾亲自带领特工完成多起几近不可能完成的任务。江宁接受韦明的任命后首要任务，就是按对方的指示招揽六名主要的组织成员，他们表面上各有不同职业隐藏真正的身份，实则各有个人专长......

　　While investigating the disappearance of a teen girl in a tight-knit Galician town, a Civil Guard officer uncovers secrets linked to a loss of her own.

　　星期三·亚当斯（珍娜·奥尔特加 饰）聪明、爱挖苦人，内心有点死气沉沉。在调查一起连环杀人案时，她在奈弗莫尔学院结识了新朋友，也遇见了新对手。

　　TNT宣布续订《重案组》第五季10集。

　　The halves of two bodies, one belonging to a female Swedish politician, are discovered in the middle of the Øresund Bridge, which connects Copenhagen in Denmark with Malmö in Sweden. The body, cut in half at the waist, has been placed precisely on the border between the countries, thus falling under the jurisdiction of both the Danish and Swedish police agencies. After further examination, it turns out that the body is that of two separate corpses, with one half belonging to a Danish prostitute. Saga Norén, from the Swedish side, and Martin Rohde, from the Danish, lead the investigation to catch the murderer.[4][5]
　　The investigation quickly escalates as a journalist, Daniel Ferbé, whose car was used in the crime, begins receiving phone calls. The caller, who becomes known as the "Truth Terrorist", claims to be committing his crimes in order to draw attention to various social problems. A social worker, Stefan Lindberg, whose sister becomes a victim of the Truth Terrorist, becomes an early suspect. However, events soon lead the Danish and Swedish teams to conclude that the killer has connections to the police. They discover that the crimes have been planned over a period of several years. The trail eventually leads them to Jens, a Danish policeman and former close friend of Martin's, who was thought to have committed suicide after an accident on the bridge caused the deaths of his wife and son.
　　In the course of the investigation, Martin and Saga develop a close working relationship, although they are very different people. Martin has a twenty-year old son from his first marriage, August, who is now living with Martin and his current wife, Mette, by whom Martin has three children; after Martin has had a vasectomy, Mette discovers that she is expecting twins. Saga lives alone and does not seem to feel she needs a serious relationship, instead picking up men in bars for casual sex. She appears to have symptoms consistent with Asperger syndrome, resulting in difficulty establishing relationships and feelings of inadequacy in managing people; she refuses a promotion for this latter reason.
　　After the killer has murdered several people and successfully thrown red herrings in the way of the investigation, his true purpose - to strike at Martin himself - eventually becomes clear. Jens, now calling himself Sebastian Sandstrod, first approaches Mette, who is susceptible to his advances, after learning that Martin has slept with Charlotte Söringer, a woman who is peripherally involved in the investigation. Sebastian lures Mette and her children to a remote spot where he subjects them to a terrifying ordeal, locking them in with a room and giving her a hand grenade with its pin removed to hold as long as she can. However, Saga realises that August is the real target. The investigation culminates in a confrontation on the bridge, where she cannot help but tell Martin what happened to August and has to fire at him in order to prevent him destroying his career by killing Sebastian, the killer's final intention.