I use the question mark for now because there has been no official word from AMC on this but TheWrap is reporting that according to a reliable source, AMC has picked up the Bryan Cranston starrer "Breaking Bad" for a 4th season.
If this turns out to be true, season four of "Breaking Bad" would premiere spring 2011.
I didn't know this wasn't official yet, but Bryan Cranston explained during the chat with Malcolm France last month that the 4th season would likely be shot in August. So I think we'll get to see a season 4!
I don't know that if it was official announcement or not. But Its true that Breaking Bad has been renewed for season 4 and it is estimated that one single episode will take $3 million though AMC has not been ready for the budget of show.