John Graff is a character in Netflix's 'The Watcher,' but everyone wants to know if he was a real person. What to know about him and the man he was based on.

The series' third episode introduces the story of John Graff (Joe Mantello), a former owner of the house who had his own lethal history. Read on to learn what we know about the Graff character's ...

Netflix's new limited series The Watcher has become the true-crime fictionalization to watch, even if you weren't previously familiar with the real-life case. Created by Ryan Murphy and based on a ...

In episode 3, The Watcher introduces us to John Graff (Joe Montello) , a mild-mannered accountant who once lived at 657 Boulevard Ave. John Graff would go on to, uh ...

What The Watcher's John Graff and John List have in common. In episode 3, "Götterdämmerung," Dean Brannock (Bobby Cannavale) learns another dark chapter in his new home's history.

The Graff character (played by Joe Montello) in the show is loosely based on a psychopath named John List, who, like ‘The Watcher,’ also terrorized Westfield in real life.

John List, left, and Joe Mantello as John Graff in The Watcher. Getty; Eric Liebowitz/Netflix. On November, 9, 1971, List sent his children to school, then got two old handguns from his garage.