Tricia Janine Helfer (born April 11, 1974) is a Canadian actress and former model, best known for her role as Number Six in the re-imagined Battlestar Galactica miniseries and television series, her role as "Carla" on Burn Notice, also on TNT's TV drama "Dark Blue" as FBI Special Agent Alex Rice, and for hosting the first season of Canada's Next Top Model.