Grey's Anatomy Sneak Peeks: Very Bad Blood

On this week's Grey's Anatomy episode, Derek and April work around the clock to find a solution for the hospital, while Cristina struggles to respect the religious wishes of a family whose son is dying.

The episode title, "Bad Blood," takes on a literal meaning for the Jehovah's Witness patient, whose parents steadfastly won't allow any blood products to be used in his medical treatment.

Cristina appears to begrudgingly acquiesce to their concerns, but it looks like her intern, Tessa Ferrer's Leah, has other ideas and goes rogue, at least based on this sneak preview clip ...