This is going down! "The Defenders" are ready to rumble this summer.

Netflix released the first teaser trailer for the Marvel superhero team-up series and announced the premiere date: August 18.

The video shows all four Defenders -- Daredevil (Charlie Cox), Jessica Jones (Krysten Ritter), Luke Cage (Mike Colter), and Iron Fist (Finn Jones) seen by a security camera entering an elevator. "Going down," the elevator announces, before Jessica takes it upon herself to smash the camera -- at exactly the 08:18:20:17 mark.

The video also flashes a website address (http://23.253.120.81) that leads to the New York Bulletin, where "Daredevil's" Karen Page (Deborah Ann Woll) works.

The big Marvel crossover brings on Sigourney Weaver as big bad Alexandra, as well as characters from the four series.

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