Katherine Heigl -- who plays teen alien Isabel on The WB's Roswell -- told SCI FI Wire that her character will continue to evolve as the season progresses. "Isabel is becoming, I think, a far more interesting young woman, who is very complex, but who is taking the things and experiences she's dealing with and turning them into something that is shaping her and who she is and who she will be," Heigl said in an interview. "I'm really loving the evolving process of this character. She's sort of coming into her own now."

Heigl -- who was promoting her upcoming horror film Valentine in Los Angeles -- added that Isabel has already seen her dark side, in the form of Loni, her tough-talking New York doppelganger from this season's episode "Meet the Dupes." "She's seen Loni ... who is just another half of her," Heigl said. "And that's becoming part of who she is, too. Because she is that: She is also a very strong woman. And I think she's becoming more comfortable with her title and her purpose. And these are all things that really interest me."

Heigl added that she favors the show's change to more SF-oriented plots in its sophomore season. "I like it, personally," she said. "I never thought I'd be a big fan of sci-fi, but I'm fascinated by the stories they come up with. And I find the mythology just enthralling most of the time. And it keeps me watching, which is hard, because I just filmed the thing, so I know what's going on. But I know that it was a big transition. ... I think people are slowly warming up to the idea of it being more sci-fi, but I think it's ultimately better for the show that it is."