Giancarlo Esposito, Kim Raver

She completes him. And that may or may not be a good thing. Ever since NBC's new thriller Revolution premiered, we've been hearing wicked warlord Tom Neville (Giancarlo Esposito) talk lovingly and longingly about his wife, Julia. We finally meet her in Monday's episode (10/9c, NBC), and she's played by former Grey's Anatomy star Kim Raver.

"Getting Kim to do our show is a huge win for us because Julia is a cool and very complex character," says creator Eric Kripke. "Before the world lost power, Tom was a mild-mannered insurance adjustor and now he's a Machiavellian henchman. His wife went through a similar transformation. They are very much each other's match, not unlike the Macbeths."

That's fine by Raver. "When you're a lead character on a series, like Teddy on Grey's, it's all about being accessible and likable, but on Revolution it's about doing things to survive that the audience might not like," Raver says. "I think you'll love watching the Nevilles make their moves. But will you actually like Julia? I don't know. Some people root for Lady Macbeth, don't they?"

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