Tricia Helfer. Actress: Battlestar Galactica. Tricia Helfer is a Canadian cover girl model-turned-actress who has developed her resume beyond the catwalk to include many diverse roles highlighting her versatile and natural screen presence. Best known as the face of the series, and for her Leo award-winning lead performance as the humanoid, Cylon 'Number Six' in the critically acclaimed Syfy series, Battlestar Galactica (2004), Helfer has since gone on to book...