Mr. Mercedes
            
            
            
            A demented serial killer taunts a retired police detective with a series of lurid letters and emails, forcing the ex-cop to undertake a private, and potentially felonious, crusade to bring the killer to justice before he can strike again. Based on the bestselling novel by Stephen King.
            
            
            
            
            
            Season 3
            
            
            Season 2
            
            
            Season 1