ABC has ordered nine more episodes of Samantha Who? a day after the show posted its best ratings yet. After three telecasts, the series ranks as the year's top-rated new comedy.

Samantha Who? is ABC's first half-hour comedy to score a full-season pickup.

Samantha Who? stars Christina Applegate as a woman who suffers from amnesia after an accident -- and is mortified to discover that she used to be a pretty horrible human being. Jennifer Esposito, Kevin Dunn, Melissa McCarthy, Tim Russ, Barry Watson and Jean Smart also star.