A scary new trailer has debuted for FX's upcoming horror series The Strain, based on the original novels by Guillermo del Toro and Chuck Hogan. A beauty is set to unleash a mighty fearsome beast in this latest tease, as an evil strain of vampirism grips New York City. Corey Stoll stars as the head of a CDC canary team who must investigate this viral outbreak, relying on the colorful locals of his neighborhood to help save humanity. Premiering this July.