The psychological thriller explores the cracks of small-town America in the wake of discovering a serial killer among them John Krasinski and Matthew Rhys (Getty Images) John Krasinski and Matthew Rhys are set to executive produce and star in “Silent River,” a new psychological thriller ordered by Amazon MGM Studios for Prime Video. According to the official logline, the project, which is seen through the lens of two men whose lives are far more more connected than they realize, explores the