Summer reality stalwart Big Brother returns to CBS tonight. The promos promise exciting new twists (maybe the Big Brother House is now under a dome?) The question is whether viewers are still interested in the show. Last season, the show premiered on July 12, 2012 to a 2.6 adults 18-49 rating. Its season finale on September 20 garnered a 2.6. How do you think tonight;s premiere will fare? Make your predictions.