January 4, 2007
Episode 1 of Season 4 premiered on January 4, 2007
January 23, 2007
Episode 2 of Season 4 premiered on January 23, 2007
January 31, 2007
Episode 3 of Season 4 premiered on January 31, 2007
February 8, 2007
Episode 4 of Season 4 premiered on February 8, 2007
February 22, 2007
Episode 5 of Season 4 premiered on February 22, 2007
March 6, 2007
Episode 6 of Season 4 premiered on March 6, 2007
March 13, 2007
Episode 7 of Season 4 premiered on March 13, 2007
March 14, 2007
Episode 8 of Season 4 premiered on March 14, 2007
March 19, 2007
Episode 9 of Season 4 premiered on March 19, 2007
March 26, 2007
Episode 10 of Season 4 premiered on March 26, 2007
April 13, 2007
Episode 11 of Season 4 premiered on April 13, 2007
April 26, 2007
Episode 12 of Season 4 premiered on April 26, 2007
May 21, 2007
Episode 13 of Season 4 premiered on May 21, 2007
May 29, 2007
Episode 14 of Season 4 premiered on May 29, 2007
May 31, 2007
Episode 15 of Season 4 premiered on May 31, 2007
June 18, 2007
Episode 16 of Season 4 premiered on June 18, 2007
June 22, 2007
Episode 17 of Season 4 premiered on June 22, 2007
July 18, 2007
Episode 18 of Season 4 premiered on July 18, 2007
September 5, 2007
Episode 19 of Season 4 premiered on September 5, 2007
September 24, 2007
Episode 20 of Season 4 premiered on September 24, 2007
October 5, 2007
Episode 21 of Season 4 premiered on October 5, 2007
October 17, 2007
Episode 22 of Season 4 premiered on October 17, 2007
October 22, 2007
Episode 23 of Season 4 premiered on October 22, 2007
October 30, 2007
Episode 24 of Season 4 premiered on October 30, 2007
November 2, 2007
Episode 25 of Season 4 premiered on November 2, 2007
November 29, 2007
Episode 26 of Season 4 premiered on November 29, 2007
December 1, 2007
Episode 27 of Season 4 premiered on December 1, 2007
December 10, 2007
Episode 28 of Season 4 premiered on December 10, 2007
December 13, 2007
Episode 29 of Season 4 premiered on December 13, 2007
December 14, 2007
Episode 30 of Season 4 premiered on December 14, 2007
December 21, 2007
Episode 31 of Season 4 premiered on December 21, 2007