In 2002, Fenn was one of several former "Twin Peaks" stars, such as Dana Ashbrook and Mädchen Amick, to have a recurring role on The WB's "Dawson's Creek". She guest-starred in three episodes from the fifth season, as Alex Pearl, the seductive manager of the restaurant where Joshua Jackson works. Fenn was afterwards cast as Harley Quinn in The WB's "Birds of Prey", but was replaced by Mia Sara before the series began. Fenn starred in the original pilot episode, but dropped out, due to scheduling conflicts, as the show's creators realized that the character Harley Quinn would need to be a bigger part of the show.