Here is the first promo for next week's episode of Grey's Anatomy, "Tainted Obligation."

The premise is simple, but the decision could not be more loaded for Meredith Grey:

Thatcher Grey needs a transplant or he will die, and she, not Lexie, must provide it.

Does she owe him anything? Should she do it anyway, for Lexie's sake if nothing else?

Check out the promo and see what you think ...

[video url="http://www.tvfanatic.com/videos/tainted-obligation-promo/" title="Tainted Obligation Promo"] [/video]

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