On tonight's Grey's Anatomy, a new cardiothoracic doctor comes to Seattle Grace-Mercy West, one quite unlike the previous "cardio gods" (or goddesses) who've held the position.

Dr. Teddy Altman (Kim Raver) has a past with Owen (Kevin McKidd), which will undoubtedly create future problems for Owen and Cristina (Sandra Oh), as the sneak peeks show.

In a new Q&A with TV Guide, Kim Raver dishes on the new love triangle, how long she'll be sticking around and the possibility of returning to 24 to reunite with Jack Bauer.

Q: Tell us about Dr. Teddy Altman.

Kim Raver: She's amazing at what she does. She's coming from Iraq. Her and Owen were in Iraq together. I come to Seattle Grace and there's something interesting that plays out with us.

Q: Is Teddy a mean doctor or a nice one?

Kim Raver: [Executive producer] Shonda Rhimes said she's kind of a bad ass, but she's different than the other cardio doctors that have been at Seattle Grace. She approaches things really, really differently. She's also not warm and cuddly, either.

Q: What's her relationship like with Owen?

Kim Raver: All I can tell you is that they were in Iraq together and it will unfold as you see what their relationship is. That's the fun thing to tune in and check out. I can say there is some kind of triangle, but it's very different than what people are expecting. I think Shonda and her team have done an amazing job in the way they introduce my character. I was surprised and wondering how they would, because I know people really care for Owen and Cristina.

Q: Should fans be worried that Teddy will come between Cristina and Owen?

Kim Raver: It's complicated. I think fans will be interested in how that whole relationship is dealt with. That's why I say Shonda is so clever in the way she's bringing Teddy into both of their lives. It's a fantastic triangle and it gets complicated and interesting.

Q: The love triangle actually has a fourth point in Jackson Avery (Jesse Williams). These hospital relationships are getting really jumbled.

Kim Raver: But that's the excitement of coming in. Not knowing who is with whom, what's happening to whom. I'm not sure what their plans are for that. We definitely have scenes, but I'm not sure what their thoughts on where that is going to go.

Q: Owen hasn't been able to talk to Cristina about his time in Iraq. Will he open up more to Teddy since they have that bond?

Kim Raver: We'll see. They have definitely spent time in Iraq together, so that's a common thread with them.

Q: How long will Teddy be sticking around?

Kim Raver: The producers and I have talked, but we're just seeing how it goes. We'll see.

Q: Who have you been working with the most?

Kim Raver: I've worked with Eric Dane and Jessica Capshaw a lot. This group is amazing. They have something special. We laughed a lot on Lipstick Jungle, but I laugh even more here.

Q: Fans are still upset about the cancellation of Lipstick Jungle.

Kim Raver: It's crazy because all of a sudden they're able to get the numbers off DVR and it's crazy because we were getting good numbers on DVR. I was very fortunate to be on that show. People still ask what happened to this day. It's great in the sense that I'm now meeting another great group of people and I'm so happy to explore this character.

Q: There are rumors that this will be the last season of 24. Is there a chance you could return?

Kim Raver: I definitely have a romantic soft spot for Audrey and Jack. If this is the last year, I would hope that they have some kind of reunion. That also is a show that you never know until you know what you don't know, you know? You think it's one thing and then it turns out to be something completely different. Have I shot anything yet? No.

They haven't finished filming yet, so we'll have to wait and see.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.