This was posted in the Q3W forum. I just finished watching it. Very interesting stuff explained in ways that makes "normal" people understand the basics of how forces like gravity, electromagnetism, and strong and weak nuclear forces, or Einstein's General Theory of Relativity and Quantum Mechanics works and the search for the a theory that explains everything in one go. That unifies everything and will explain how all of the Universe works. It also shows how it's thought that the String Theory, or the M Theory might be this unifying theory.

http://www.pbs.org/wgbh/nova/elegant/program_t.html