Journey with us through the fogs of time back to the ancient past, when you could get away with blood, swearing, and the occasional instance of partial nudity in a PG film, and studios didn't treat R-rated releases like potential box office poison. It was an era when an influential young filmmaker would single-handedly change the future of movies simply by suggesting the appendage of two numbers to an existing rating. The year? 1984. The filmmaker? Steven Spielberg. The rating? PG-13.

Fast-forward to today, and a world in which PG-13 has come to bestride the industry like a great colossus. How did we get from there to here? What is it about the PG-13 rating that has led to it so dominating the board, especially in the sci-fi/fantasy/horror (yes, even horror) genres? And where does this long, winding, bloodless, one-f-bomb-allowed road lead?

Join Battlestar Galactica's Nicki Clyne (@nickiclyne on Twitter) and Blastr TV below for an exploration of one of the most influential developments in movie history: The birth and rise of PG-13.