Excellent episode; very emotional. The writers are obviously incorporating the growth and maturing of the characters in their writing. The parallels between Meredith's case with her patient, and Christina's case with hers, were very interesting and poignant. William Daniels' portrayal of Dr. Thomas in this seasons' episodes has been outstanding; I hate to see him go. Many viewers would not have picked up on the significance of his line, "I'm not Craig! I'm Dr. Thomas!" This character's first name was Craig. But I think this was a clever reference to Daniels' Emmy-winning performances on "St. Elsewhere" years ago, on which he played "Dr. Craig." I think the side-story in this episode with Zola being sick was to show that Meredith is becoming more and more like her mother. Excellent episode.