Dushku Talks “Big Bang” Guest Role

Actress Eliza Dushku is no stranger to television.

She had recurring roles on “Buffy the Vampire Slayer” and “Angel” and headlines “Dollhouse” for two seasons.  Tonight, she shows up for a guest role on “The Big Bang Theory” as an FBI agent sent to look into Howard’s background for a security clearance.

Of course, things don’t go smoothly the actress says. And it’s because of (you guessed it) Sheldon.

“It’s typical Sheldon! He can’t help himself. He tells me more than he should and more than I want to know,” Dushku tells TV Guide.

The actress said that when she was offered the role, she immediately began to research the show and its characters.

“I am a fan, but I have to be honest. I Wikipedia-ed each of their characters to see things that have been revealed and things that might be in their file so I would get lines that I wouldn’t have made the connection to because I haven’t watched every single episode,” Dushku says. “When they said little things, I could raise an eyebrow or have a light bulb go off. Wikipedia has such an intense rundown on all the characters and all the actors. I mean, I really felt like I could go in as an FBI agent who had all my information on them.”

Dushku says she was offered a role on the part six or seven months ago, but that producers Chuck Lore and Bill Prady decided to wait and find the right on-screen role for her work on “Bang.”

“I was excited then, but this is better than what might’ve been. I love comedy. … I feel like I really want to get back into that playful side of me because it’s so much of who I am,” she says. “I think back to ‘Bring It On’ and ‘Jay and Silent Bob Strike Back’. [Big Bang] was so much fun. I love the format and the schedule for a half-hour multi-camera. You rehearse, you play around with it and then it’s the live audience night. You have so much adrenaline. I had my family and friends in the audience [and after] my first take, they were like, ‘Yeah, your first take — you were a little stiff.’ But we get to do it again, unlike theater, so once I got through that, it was very natural and very fun.”

You can catch Dushku on tonight’s all-new “Big Bang Theory” on CBS.