Beginning January 8, 2009, the hit drama series "Private Practice" moves to Thursdays at 10:00 p.m., ET. The series that introduced the world to Addison Montgomery, award-winning "Grey's Anatomy," will serve as the lead-in for "Private Practice," at 9:00 p.m., ET.

The critically-acclaimed "Life On Mars" moves to Wednesdays at 10:00 p.m., ET, following the hit drama series, "Lost," at 9:00 p.m., ET, beginning January 28, 2009.