There's a new girl in Seattle Grace, well she's not so new, but she's new in Derek's mind - Nurse Rose. She wears a green nurse's uniform placing her higher up the rank than Meredith's pale blue attire and she's caught Derek's eye, finally, after 36 surgeries in his OR. Does this mean Derek's ready to move on? But will Meredith be when she finds out her McDreamy is starting to let go?

Meredith to Cristina: It's not about the sex. It's not... about the sex. It's about that moment afterward... when the world stops. It just feels so safe, so safe. I'm not ready to give that up. I'm not ready to give that up.

In the episode 'Forever Young' Derek and Meredith leave Joe's Bar together when Derek catches Rose's eye, a look is cast between them. It's just a look, but it implies so much more. It's the point where two paths have crossed, creating an uncertain future for Meredith and Derek. Could Rose signal the end for Meredith and McDreamy? Or will losing McDreamy be too much for Meredith to bare, causing her to fight for the man she loves.

Meredith to Cristina: The more available he gets, the more I pull away.

Perhaps if Derek becomes less available, Meredith will become more available. But will it be too late for McDreamy to turn back?

Have your say. What do you think of Nurse Rose coming on to the scene? Do you think this is a good thing for Meredith and McDreamy, or not? Check out our poll and let us know what you think.