Summer Glau: Guest Star in spy series "Chuck"

Action babe Summer Glau has scored herself a guest role on NBC’s spy series "Chuck"!

According to EW, the Sarah Connor Chronicles actress will play the show’s newest Greta. The 29 year-old actress as been tapped as "Buy More’s rotating undercover agent in this season’s eighth episode".

Other Gretas playing this season are Isaiah Mustafa, Stacy Keibler and Olivia Munn.

[Photo courtesy by Andrew H. Walker/Getty Images]