We've hinted for some time at a rough patch on the way for Mark and Lexie. But here's another piece of the puzzle courtesy of Michael Ausiello of Entertainment Weekly.

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Q: I love Grey’s Anatomy but what’s this I hear about trouble on the horizon for Mark and Lexie? Who is this supposed mystery woman from Mark’s past?

A: From what I've gathered thus far, I believe she hails from Terminator: Sarah Connor Chronicles and has McSteamy DNA coursing through her veins.

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