Check out a bewildering teaser trailer for Guillermo del Toro's new vampire series The Strain. But wait — before your eyes glaze over at the mention of vampires, give this a shot. It's really cool.

The rats pumping out of the sewers is a BIG part of the mystery series that this soon-to-be TV show revolves around. The rats spread a disease, a disease that leads to the most disgusting vampires of all time. And we can't wait to see them in the brand new FX series.

Check out the first ever teaser trailer now.