Move over, Dr. Foster, there's a new woman gunning for Cal Lightman.

Battlestar Galactica alum Tricia Helfer will guest-star on a Season 3 episode of Lie to Me, TVGuide.com has learned exclusively.

Helfer will play Naomi, who's attracted to Lightman (Tim Roth) despite being frustrated by the inability to hide anything from him. But when she calls on Lightman for protection from a violent ex-boyfriend, it's Lightman who begins to wonder if her beauty has impaired his lie-detecting skills.

Best known as Cylon Number Six on Battlestar, Helfer, 36, currently stars opposite Dylan McDermott on TNT's Dark Blue. She also recently guest-starred on USA's Burn Notice and the series premiere of Fox's Human Target.

Helfer joins a slate of Lie to Me Season 3 guest-stars that includes Breaking Bad's Anna Gunn  and Shoshannah Stern. The airdate for Helfer's episode hasn't been scheduled.

Lie to Me wraps its second season Monday, Sept. 13 at 8/7c.

It returns for Season 3 Wednesday, Nov. 10 at 9/8c.