Mr. Mercedes is streaming on Peacock October 15th. https://www.peacocktv.com/?cid=20201001originalsmrmercedesownsocial180&utm_campaign=20201001originalsmrmercedes&utm_source=yt&utm_medium=own&utm_content=mrmercetrailer&utm_term=peacocktv

A retired detective sets out on a dangerous and potentially felonious crusade when a serial killer begins tormenting him through a series of letters and emails.