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Seasons
All seasonsAbout
Monsters can be found lurking behind any innocent smile and on any street corner in America. Never-before-seen-video footage stares straight into the eyes of these killers who hide in plain sight. Anyone can be a monster.
First Aired
Jun 1, 2016
Last Aired
Dec 30, 2025
Seasons
13
Episodes
130
Network
Investigation Discovery
Studio
Discovery, Arrow Media
