Grey's Anatomy Season 9, Episode 6 Preview: How to Train Interns (VIDEO) Tweet November 8, 2012 at 10:42PM EST by Rebecca Martin Related: Grey's Anatomy, Cristina Yang , Season 9 , Season 9 Episode 6 Credit: YouTube Air date: November 15, 2012. Guess who's back, back again on Grey's Anatomy Season 9, Episode 6: “Second Opinion”? Cristina (Sandra Oh), duh!
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