Complex sentence: The second season premiered on September 4,2010, the third season premiered on 12 February, 2011, the fourth season premiered Thursday September 1,2011 the fifth season premiered March 1,2012 and the sixth season premierd September 6,2012.
Split into simpler sentences: The second season premiered on September 4,2010, the third season premiered on 12 February, 2011. The fourth season premiered Thursday September 1,2011 and the fifth season premiered March 1,2012.