There are nearly seven billion people on this planet. Each one unique, different. What are the chances of that? And why? Is it simple biology, physiology that determines this diversity? A collection of thoughts, memories? Experiences that care out our own special place? Or is it something more than this? Perhaps there’s a master plan that drives the randomness of creation—something unknowable that dwells in the soul, and presents each one of us with a unique set of challenges that will help us discover who we really are.
--Mohinder’s voiceover at the beginning of “An Invisible Thread,” the third season finale of Heroes