Piper Perabo Piper Perabo

Part 2 of Covert Affairs' fourth season can be summed up in one word: dark. And we're not just talking about Piper Perabo's new brunette locks.

"There's a grittier, darker feel to these six episodes with Annie [Perabo] off the grid," executive producer Matt Corman tells TVGuide.com. "I think we've always seen the show as an evolution of a spy. We thought it'd be interesting in these six episodes to unplug her and put her completely on her own without her safeguards of the agency. And when you're on your own, things aren't easy."

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Also expect Annie to draw inspiration from having watched Calder (Hill Harper) and Teo (Manolo Cardona) in the field. "Even things that she saw them do ... and things that they did to people — she ends up sort of behaving like them because those are her examples of strong guys who get it done no matter what," Perabo says. "It gets kind of dark. Not just the hair! ... The hair is a total metaphor!"

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