'Big Bang Theory': Eliza Dushku to grill the guys

eliza-dushku-gi-320.jpg "The Big Bang Theory" guys are going to enjoy getting interrogated.

Eliza Dushku, "Dollhouse" and "Buffy the Vampire Slayer" star, has been cast for the seventh episode of "Big Bang Theory," which returns for its fouth season on Thursday, Sept. 23.

A publicist confirms to Zap2it that Wolowitz (Simon Helberg) is trying to get top-level security clearance, and in order to clear him, the attractive G-man (Dushku) will interview his friends about his past and any secrets he may have.

The character's name is unconfirmed at this time. She'll only appear in the one episode, but if you want to see more of her, try watching "Dancing With the Stars" to see if she'll be in the audience supporting her boyfriend, current contestant Rick Fox.

Follow Zap2it and @cadlymack  on Twitter and Zap2it on Facebook for the latest TV, movie and celebrity news.

Photo credit: Getty Images