"Stacy Keibler is a really good friend of mine, and she has kind of helped me out a little bit," said Chris. "Basically, it's all the same thing: That you have to be in this 100 percent, because it is the most physically and mentally demanding thing you will ever do—and so far she has been right."

It’s the return of the Gretas tonight on Chuck!

That’s right, we said Gretas, plural, when the rest of Jane Bentley (special guest star Robin Givens)’s team shows up, and it’s a couple of familiar faces. Isaiah Mustafa and Stacy Keibler resume their roles, only this time we get to learn their actual names when their seemingly-perfect agents come into Castle to work on a private mission with Casey (Adam Baldwin) and make Chuck (Zachary Levi) fear he will no longer be needed at all.

In between takes we grabbed a few minutes with both Mustafa and Keibler to talk about the evolution of their characters and why they’re both thrilled to be back working on the best spy series on television. Read on!

LA TV Insider Examiner: It’s great to see you guys back on Chuck! Now, last time around, you were each portraying a Greta. How are your roles different this time around? Are they bigger and badder than before?
Stacy Keibler: I am a part of a new team with Casey, and Robin Givens is actually my boss. I get to be much more physical; I’m holding a gun a lot more in this episode. I’m thrilled to be back, and I’m thrilled to get to be a lot more physical because I really love doing this action stuff.

Isaiah Mustafa: I think he was always big and bad, but now you get to see where that big and bad takes him. How his relationship with his partner develops. And you just get to know this Greta’s name this time around. It’s Rick. Rick.

S.K.: We are on the same team and we are very-- I like to say my character is kind of an evil robot at times. She is just one kick-ass, badass woman. She means business. She’s definitely-- I don’t think anybody thinks twice that she couldn’t kick their ass and throw them down.

How is that yout partnership? Do Rick and Vicky get along?
I.M.: Oh yeah, we get along. We’re military, so I think we have no choice. There are no likes and dislikes; it’s just how it is.

So there shouldn’t be any fighting amongst the team--
I.M.: No, she’s great! She’s super cool to work with. When they told me I was going to be paired up with Stacy, I was like ‘No way, cool!’ I used to substitute teach junior high, and the only way we’d get the kids to, like, listen and watch was if I brought in WWE the next morning. The kids, you know, they loved her, so I was telling her ‘You helped me keep my class in line. It’s so cool to be hanging out with you!’

But we should anticipate some fight scenes nonetheless, I'm sure. Yvonne did mention that she thinks Sarah would like to go after both of the Gretas and smash their faces in [Laughing]. So what can we expect from you guys, physically, in this episode?
S.K.: I’m doing a little kung fu; I went through shooting-- gun practice. Pretty much, we’re doing a little bit of everything.

I.M.: All I do is stunts, so I always feel at home doing a little bit of action. This time around I get a little bit of gunplay and a little fisticuffs, let’s say.

What are your favorite aspects of that kind of stuntwork?
S.K.: I’d say the kung fu. I have to go through rehearsals to learn the kung fu and try to make it as realistic as possible and also make sure that everyone-- as authentic as it is, me never having studied kung fu-- there’s a little bit of protecting each other that has to happen. It’s a challenge I’m always up for. I really enjoy learning about these stunts and fighting and stuff, and it makes me want to go on my own time and learn, do some more martial arts.

What is your favorite part about coming back to Chuck?
S.K.: It’s just such an awesome cast and crew! It’s a great working environment being on this set! It’s great to see Zachary Levi and get to work with him because we’ve been friends for years, and Yvonne is amazing as well. I got to meet more of the cast and get to do more action with all of them, so it’s been an awesome shoot.

Does it make it easier to work on such physical scenes when you have that kind of history with another actor?
S.K.: I think that it makes it more fun. I think it just makes it a more fun working environment, and yeah, it does make it a little easier that we already have a relationship and have been friends.

And how is the dynamic between Rick, Vicky, and their boss?
S.K.: I think she’s going to be a pretty tough boss, and I think that I’m right on her team because my character is definitely on it. I think she knows I’m responsible and I get the job done.

Speaking of which, have you heard of Stacy Keibler? She used to be involved with professional wrestling, and then she was on this little show that we sometimes watch when we're forced to (except for this one guy in the office) called Dancing with the Stars. Now she's busy doing fight scenes in three-inch heels on NBC's Chuck, and modeling, and, she told us the other day after our photographer friend visited her apartment in Los Angeles, "reuniting with some of my former WWE co-workers." Whatever that means. Anyway, she's big on the Twitter and the Facebook. She's big on the Interwebs, apparently. We just thought she was really inviting in general. Always have.

Everything's always so crazy that I have to be able to take a day of leave — take a breath, to be by myself. I like to have a massage therapist come to my house, get a massage, take a bath, go to bed. That's a perfect night alone for me.

I moved here all by myself. I had one friend that I knew, but that's really nothing, and that's what made it so hard. I didn't fully embrace and love L.A. until I had good friends, but it was quite a time for those first couple years because I feel like everyone is trying to sort of — it's very hard to find people you can trust out here.

I prefer being a small fish in a big pond. When I did the WWE, people would recognize me. And then you come out to L.A., it was like a different kind of people that recognized me, after I was doing Dancing With the Stars and all that.

I live in white tank tops — a white tank top and underwear.

I don't wear anything when I go to bed. Most of the time.

I've had a couple weird things sent to my house — and my parents' house. People want me to send an index card in the mail, and they want me to kiss it with lipstick and send it back. Or, like, take a picture of my feet.

I've never taken a picture of my feet. I've done some things, but as far as people sending index cards to my house, I don't generally go in the other room and put lipstick on it.

I was a little late in the game for Twitter and Facebook and everything because I thought, "Oh, I don't know. I just don't have time." But then I kind of just let them get a taste for who I am, what I'm doing, and what I like.

I'm constantly working out, trying to make sure my butt is together. The other day, I hiked with three-pound ankle weights on my legs and went for a hike.

I have days where I feel like crap and I look at my body and I'm like, "I haven't been able to work out as much. I can see my butt drooping a little bit." And I'm just like, "Oh well."

The massage therapist? I usually have 'em come over once a week.

Look oh-so-stylish with your oversized ERINN clutch! Look oh-so-stylish with your oversized ERINN clutch! This particular ERINN was inspired by Stacey Keibler. This light weigt woven solid fabric in gold with flecks of metallic threads combines perfectly with the elegant vanilla sateen band. Unsnap to reveal a vibrant animal like print in salmon pink, and a zipper pocket lined with a darling pink faux suede. $10 from each bag sold will be donated to the After-School All-Stars, an organization that provides year-round, school-based, comprehensive after-school programs that equip children with the skills and experiences needed to become members of the 21st century workforce.

Features: Soft pleats add interest to the exterior, while an interior zippered pocket keeps your valuables secure.
Dimensions: Width 14.5" (at widest point) 12” (at top band), Height 8.25"
Closure: Magnetic Snap