I love Summer. I tried casting Summer [before]; this was probably four years ago. The last pilot that I did, which never went anywhere, I had hired the same casting agents as Joss [Whedon] had. So they brought Summer in one day, and I fell in love with her. And I tried casting her, but I was in second position to Serenity, the movie. [...] And then obviously I saw her in Serenity and thought she was perfect in it and always kept her in mind. And like Lena, there was really no second choice. That part is basically written for her.