Sky 1 is adding a new crime event series, The Four, from author Harlan Coben and RED Production Company (Happy Valley and Last Tango in Halifax.)  The eight-part thriller follows the success of Harlan Coben’s first original story for TV, The Five, which debuted in April on Sky 1 to critical acclaim. The Four is a stand-alone thriller that tells the story of an idyllic family community shattered by secrets, lies, suspicions and misguided trust. The Four is created by Harlan Coben and written by Danny Brocklehurst. Executive producers are Harlan Coben, Danny Brocklehurst and Nicola Shindler for RED Production Company.