I really enjoyed the whole Jen/Rob/Derek/Addison storyline. I really think that it was more complex than Derek feeling guilty over his surgical mistake. When the couple was first introduced he commented to Meredith that they reminded him of them. And so I wonder if it's possible that the reason Derek was so desperate to save Jen is because he felt that it was like he was saving Meredith.
Did I forget anything?
What did you all think of the episode?