TV shows you definitely shouldn't watch alone at night

Paranormal Witness (2011 - Current day)
Admittedly, it's easier to discuss scary TV shows from a fictional standpoint because paranormal "reality" shows are pretty controversial. At the same time, ghoulish "true stories" have a long history of freaking us out, including classics like Unsolved Mysteries and In Search of… In that same vein, Paranormal Witness certainly knows how to spin an uncanny yarn.