From Tvguide.com and Ask Ausiello:
OK, remember me telling you how producers were looking for a "name" actress to play the recurring role of Adria, the rapidly aging daughter of Vala (Claudia Black)? Well, the name they found was Morena Baccarin, whom Firefly/Serenity fans know as prostitute, er, companion Inara.
My fandoms collide again!