The Killing (season 4)  The fourth and final season of the American crime drama television series "The Killing" consists of six episodes and was released on Netflix on August 1, 2014. Netflix picked up the series after it was canceled by AMC in 2013. The season features detectives Sarah Linden and Stephen Holder handling the fallout of their actions from the previous season while investigating the murder of a family whose only survivor is a member of an all-boys military academy. AMC, the network which broadcast the first three seasons, canceled the series after its second season, and revived it for a third, ultimately cancelling it again after the third season in September 2013. However, in November 2013, Netflix, partnering with Fox Television Studios (the production company for "The Killing"), announced it had picked up the series for a fourth and final season consisting of six episodes. Series developer and executive producer Veena Sud returned as showrunner, with Dawn Prestwich and Nicole Yorkin returning as writers and executive producers. Because they are airing on Netflix, episodes in the fourth season have a longer running time of approximately 55–59 minutes compared to 43 minutes when the series aired on AMC with commercials, and characters are able to use stronger profanity. Cast members Mireille Enos and Joel Kinnaman return as detectives Sarah Linden and Stephen Holder, respectively. New series regulars for the fourth season include Joan Allen as Margaret Rayne, the head of an all-boys military academy. In February 2014, Sterling Beaumon, Levi Meaden, and Tyler Ross were cast as Lincoln Knopf, AJ Fielding, and Cameron Stanton (later changed to Kyle Stansbury), respectively; playing teens connected to the military academy. Gregg Henry, who had a recurring role in the third season as Detective Carl Reddick, was promoted to series regular for the fourth season. The season also introduces Sarah Linden's mother, played by Frances Fisher, who abandoned her daughter when Sarah was young. In July 2014, an official 90-second trailer was released showing detectives Linden and Holder attempting to cover up Linden's killing Skinner at the end of the previous season as well as glimpses of a new case at the military academy. The fourth season scored 53 out of 100 on Metacritic based on 14 critics, indicating "mixed or average reviews". The review aggregator website Rotten Tomatoes reported a 44% critics rating with an average rating of 6.5/10 based on 18 reviews. The website consensus reads: "While its characters still intrigue and its atmosphere remains absorbingly dark, "The Killing" succumbs to silliness in its fourth season, straying into distractingly overwrought territory".