Breaking Bad returns Sunday night at 10pm on AMC for its fourth season premiere. It's been a little over 13 months since Breaking Bad's third season finale aired on June 13, 2010. Season three's ratings peaked in the season premiere on March 21, 2010 when it scored a 0.9 adults 18-49 rating and almost (but not quite) 2 million viewers. The rest of the season it bounced between a 0.5-0.7 adults 18-49 rating.
Last summer Mad Men premiered to a 0.9 adults 18-49 rating and 2.92 million viewers on Sunday, July 25, 2010.
My guess is a another 0.9 adults 18-49 rating but that for the first time Breaking Bad will crack 2 million viewers.