On Hysterical, you heard how the mind has the power to cause physical symptoms in the body, opening the door... more

In the series finale, a mysterious doctor travels to LeRoy with a new, controversial diagnosis. But is it the right... more

The investigation widens to explore two more recent outbreaks. What does a mass-poisoning across girls’ schools in Iran, and a... more

The mystery illness in LeRoy has a new victim: a boy. Across the world, curiously similar patterns emerge in a... more

An anonymous tipster slides an envelope under a parent’s door with a shocking revelation: a toxic train derailment from the... more

The illness spreads from high schoolers to a 36-year-old nurse and mother. Meanwhile, a teen girl gets a diagnosis in... more

With more than a dozen girls now afflicted with the mystery illness in LeRoy, parents are scared and demanding answers.... more

In the fall of 2011, a high school girl in LeRoy, New York falls ill: spasms, outbursts, and uncontrollably violent... more

Hysterical investigates a mysterious illness that spreads among a group of high school girls in upstate New York. What is... more