How big is Meredith and Derek's rumored fight in the next Grey’s Anatomy?

Probably not as big as some past ones ... but let's just say it's not small.

According to TV Line, and the episode synopsis, he wants his wife to work with her again. That's nice and all, except that he puts her on a neuro case without telling her, which does not go over well.

After she clearly expressed extreme hesitance about coming back to neuro, she's not only less than enthralled with the assignment itself, but the fact that Derek assigned it to her without consent.

They'll get through it, no doubt, but it's far from a small deal. Grey's Anatomy returns a week from Thursday (March 15). Check out the promo below for "One Step Too Far" ...

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