Amazing interview with showrunner/creator Vince Gilligan about Breaking Bad Season 4. He gets pretty in depth and discusses a lot of interesting points about the season, the characters and the show in general.
Part 1:
http://www.avclub.com/articles/vince...-of-bre,63013/
Part 2:
http://www.avclub.com/articles/vince...ads-4th,63113/
Part 3:
http://www.avclub.com/articles/vince...ads-4th,63196/
Part 4:
http://www.avclub.com/articles/vince...ds-four,63288/