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

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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.

Check out photos of Helfer through her career

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.