Episode 1
Episode: 1x01 | Airdate: Apr 13, 2007
Season 1
Episode 2
Episode: 1x02 | Airdate: Apr 20, 2007
Episode 3
Episode: 1x03 | Airdate: Apr 27, 2007
Episode 4
Episode: 1x04 | Airdate: May 4, 2007
Episode 5
Episode: 1x05 | Airdate: May 11, 2007
Episode 6
Episode: 1x06 | Airdate: May 18, 2007
Season 2
Episode 1
Episode: 2x01 | Airdate: May 9, 2008
Episode 2
Episode: 2x02 | Airdate: Sep 12, 2008
Episode 3
Episode: 2x03 | Airdate: Sep 19, 2008
Episode 4
Episode: 2x04 | Airdate: Sep 26, 2008
Episode 5
Episode: 2x05 | Airdate: Oct 3, 2008
Episode 6
Episode: 2x06 | Airdate: Oct 10, 2008
Season 3
Episode 1
Episode: 3x01 | Airdate: Sep 28, 2010
Episode 2
Episode: 3x02 | Airdate: Oct 5, 2010
Episode 3
Episode: 3x03 | Airdate: Oct 12, 2010
Episode 4
Episode: 3x04 | Airdate: Oct 19, 2010
Episode 5
Episode: 3x05 | Airdate: Oct 26, 2010
Episode 6
Episode: 3x06 | Airdate: Nov 2, 2010
Season 4
Episode 1
Episode: 4x01 | Airdate: Oct 28, 2012
Episode 2
Episode: 4x02 | Airdate: Nov 4, 2012
Episode 3
Episode: 4x03 | Airdate: Nov 11, 2012
Episode 4
Episode: 4x04 | Airdate: Nov 18, 2012
Episode 5
Episode: 4x05 | Airdate: Nov 25, 2012
Special
Episode: 4x06 | Airdate: Dec 2, 2012