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    'Into Madness' trailer

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'Into Madness' trailer

Two girls began having strange physical symptoms... then their personalities changed. What could this mysterious illness be? Premieres Sunday, August 27 at 9PM ET/PT on HLN.

'Into Madness' trailer

Two girls began having strange physical symptoms... then their personalities changed. What could this mysterious illness be? Premieres Sunday, August 27 at 9PM ET/PT on HLN.