Verified answer

According to reports from Comic-con at the Event panel (which screened the pilot), it is some massive cover-up or conspiracy that even the President is unaware of it. People who have seen the pilot state "the event" is not revealed yet. The producers stated the second episode would serve to give the us an idea of what the heck is going on. So, your theory of aliens might be right.

it's a Mystery show- they are Not going to Tell you- they want you to Keep Watching it to find out

"about

What if there was a cover-up so big that even the President was on a need-to-know basis? And what if some average guy stumbled upon the truth - a secret so powerful it could literally change the course of humanity? You think that guy would stand a chance of survival?

From Nick Wauters (The 4400, Eureka) and Steve Stark (Medium) comes a suspense-filled journey where the answers only lead to bigger questions.

DIGITAL FEATURES

Fans help find answers to the big questions with exclusive online video segments at NBC.com.

CAST

Jason Ritter

Sean Walker

Sarah Roemer

Leila Buchanan

Scott Patterson

Mark Buchanan

Blair Underwood

President Eli Martinez

Zeljko Ivanek

Blake Sterling

Taylor Cole

Vicky Wallace

Laura Innes

Sophia Maguire

CREDITS

Executive Producers

Steve Stark

Medium

Evan Katz

24

Nick Wauters

Eureka, The 4400

Jeffrey Reiner

Friday Night Lights

http://www.nbc.com/the-event/about/