Tricia Helfer

Tricia Helfer played Cylon Number Six, the sexy cyborg, in both the 2003 TV miniseries Battlestar Galactica and the TV series that followed. Helfer got her start as a model, winning the 1992 Ford Supermodel of the World contest and then appearing on the covers of Cosmopolitan, Elle, Health and other magazines. She has been featured prominently in advertising for Oil of Olay and Victoria's Secret clothing. Helfer also played Farrah Fawcett in the 2004 TV movie Behind the Camera: the Unauthorized Story of Charlie's Angels. In Battlestar her character is responsible for the success of the cylon attack on the human planet Caprica, but goes on to become the first cylon to experience human emotions. A regular cast member, she also co-starred in the 2007 TV movie Battlestar Galactica: Razor.

Extra credit: The original Battlestar Galactica premiered in 1978; the cast included Lorne Greene and Jane Seymour.