On the heels of yesterday's /marvels-agents-of-s-h-i-e-l-d-6-second-teaser/6 second teaser, Marvel has unveiled the first trailer for their upcoming superhero series Marvel's Agents of S.H.I.E.L.D. This latest look at the show features Clark Gregg's Agent Coulson decribing the role of the S.H.E.I.L.D agent. Check it out and read on to find out more about the viral marketing for the show.

Along with the trailer, Marvel has started the viral marketing campaign for the series. These short videos are being released by a mysterious group known as The Rising Tide, who are uncovering the truth behind S.H.I.E.L.D. and revealing it to the world. The videos feature clips from previous Marvel projects with captions on how they tie into the organization. Take a look.