In this week's episode of Grey's Anatomy, Owen sets up a mock-tragedy outside of the hospital so the doctors can learn about mass-trauma situations. Meanwhile, it's Teddy's turn to challenge Cristina by leaving her alone to monitor a lung transplant patient. Elsewhere, Bailey struggles to find the cause of Mary's death and Callie and Arizona prepare to leave for Africa.
How heartbroken are you over Callie and Arizona's breakup? Were you surprised that Cristina quit? Do you like the idea of Alex and April?
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