

Don’t let him inside your head.
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.
In the United States
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All options, opens in a new tabSeason 3, 10 episodes
Based on
Based on the novel Mr. Mercedes
Episodes
Ran for 3 seasons and 30 episodes (2017 to 2019)