A major secret is about to get exposed on Mad Men.

While we know very little about the third season of this Emmy-winning series - because its producers and writers want it that way - E! News has at least discovered the following nugget about the August 16 premiere:

Viewers will learn a secret about Don Draper's past, back when he was Dick Whitman. This will explain a lot about why Draper feels so disconnected from his roots.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.