A man who blacks out for seven hours each night has feared the day when his two lives collide, and when they do, the lives of millions hang in the balance.

I think Richiev nails it in so far as the setup is "there is a man who lives two different lives" - great. Just tell us what those two lives are in the logline,
Then what? How do they collide? What does he then do?

This is EXACTLY what I thought when I first read it.

Haha. Thanks DPG :)

"Hey guys I've got a great idea for a story... ready... it's about this guy... and each night... he sleeps."

Kind of needs some work I agree :)