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