Season Timeslot (ET) # Ep. Premiered Ended TV season Rank Viewers (in millions) Date Premiere viewers (in millions) Date Finale viewers (in millions) 1 Thursday 8:30 pm 6 April 9, 2009 6.77[204] May 14, 2009 4.25[205] 2008–2009 #96[30] 6.0[30] 2 24 September 17, 2009 5.00[206] May 20, 2010 4.55[207] 2009–2010 #108[31] 4.6[31] 3 Thursday 9:30 pm 16 January 20, 2011 6.14[208] May 19, 2011 3.72[209] 2010–2011 #116[32] 5.1[32] 4 Thursday 8:30 pm (2011) Thursday 9:30 pm (2012) 22 September 22, 2011 4.11[210] May 8, 2012 3.42[211] 2011–2012 #134[33] 4.4[33] 5 Thursday 9:30 pm (2012) Thursday 8:30 pm (2013) 22 September 20, 2012 3.50[212] May 2, 2013 2.99[213] 2012–2013 #111[34] 4.06[34] 6 Thursday 8:00 pm (2013) Thursday 8:30 pm (2014) 22 September 26, 2013 3.27[214] April 24, 2014 2.71[215] 2013–2014 #115[35] 3.76[35] 7 Tuesday 8:00 pm 13 January 13, 2015 3.75[216] February 24, 2015 4.15[217] 2014–2015 #119[36] 4.57[36]