If the latest teaser for season three of HBO's Game of Thrones left you hungry for a little more substance, the latest behind-the-scenes production vlog aims to satisfy.  With plenty of looks at our favorite characters in costume and footage of major plot points from the George R.R. Martin books, the video features executive story writer and editor Bryan Cogman, who explains the process of keeping the various plot lines, settings and characters straight.  Hit the jump to check it out.  Game of Thrones returns to HBO starting March 31st.Here's the new production vlog for Game of Thrones:[EMBED_YT]https://www.youtube.com/embed/7VB0JA78wJ4?list=UUQzdMyuz0Lf4zo4uGcEujFw[/EMBED_YT]game-of-thrones-season-3-poster