In the fourth season, a woman is found brutally murdered on a small artificial Danish island close to the ?resund Bridge. The woman is Margrethe Thormod, Thormod, Director General of the Migration Agency in Copenhagen, who was recently embroiled in a deportation scandal. Danish detective Henrik begins to investigate the murder without the involvement of Saga, due to the fact that she has now been imprisoned for the murder of her mother. Henrik is missing his colleague and wants to visit her as often as possible so she can help with the case. However, her predicament renders her unable to help. Henrik’s search for his missing daughters is also frustrated by Saga’s imprisonment and he gets close to giving up.
David Attenborough再次联合BBC推出全新纪录片，由《行星地球》团队倾力打造，全方位展现动物在觅食过程中的戏剧性一刻，并首次披露南美水濑，座头鲸的猎食行为，更借用了电影、戏剧中的片段，力求给观众一个具有说服力的印象。 摄制组的足迹遍布雨林，冻土层，海洋，草原，极地，典型生态环境一网打尽，还记录了各路科学家以及环保人士对保护濒危动物所做出的努力。 由《地心引力》的作曲家Steven Price作曲。
1 "South Island" July 18, 2011 Bear Grylls must fling himself out of a plane and parachute to safety to reach this remote area. Crossing the country's highest mountain range and starting a fire in a waterlogged forest are just some of the unpredictable things he faces in this terrain. 2 "Fire And Ice" July 25, 2011 Bear Grylls is dropped on an ice cap covering an active volcano. In blizzard conditions he struggles to make headway, and the barren land offers little food. Can he reach civilization when faced with swollen river crossings and ever present flash floods? 3 "Red Rock Country" August 12, 2011 Bear Grylls is in red rock country - southern Utah. Armed only with a lasso, he descends a rock pinnacle and gets trapped in a narrow gorge. Crossing an arid wilderness, he's left hanging 100 ft above a ravine. And Bear's craziest airplane stunt ever! 4 "Land of The Maori" August 19, 2011 Over 100 people drown each year in New Zealand, and Bear must cross a raging river on a tree trunk to head toward civilization. On his journey to safety he runs out of water, is forced to climb up active volcanic ranges and scale down a waterfall. 5 "Working the Wild" November 29, 2011 Bear Grylls takes the viewer behind the scenes to meet the crew that follows his every step. Whether he's jumping from helicopters or eating the unimaginable, the camera is never far away from the action. Now the crew gets to tell their side of the story.
该剧是"CSI和《Sex And The City 欲望都市》的混血儿"，根据系列神秘小说1st to Die, 2nd Chance, 3rd Degree, 4th of July and The 5th Horseman改编。该剧的作者显然是一个女权运动者，他认为女性要想在男性为主的领域里（比如犯罪调查）有所建树，只有团结起来相互协作。旧金山警探Lindsay Boxer (Angie Harmon, "Law & Order")能在很短的时间内分析完一个犯罪现场并得出正确结论，但是她却不善于开展后续调查，以致将一名罪犯定罪需花上几个月甚至几年的时间。周围的男同事们都取笑她，这让她深感郁闷。为了提高破案效率，她召集了一个全部由女性组成的"非官方"专家组－－一位验尸官，一位报纸记者，一位地区检察官的助手。但是作为女人，他们的私人生活和职业生活又总是纠缠不清，所以她们成了相互依靠的好朋友。她们在一起解决了一起又一起棘手的谋杀案，但随之而来的是，她们各自的爱情生活也出现了危机，一些意想不到的事情发生了……