"Migration" is the twenty-third episode of the eighth season of Grey's Anatomy and the 171st produced episode of the series. It is also the 267th produced episode of the Grey's Anatomy franchise. It was broadcast on May 10, 2012.
The residents begin to determine their futures as they make decisions regarding their post-residency positions and Cristina struggles with her conflicting feelings about her future or being with Owen. Richard encourages Alex to make the most of an offer from a prestigous hospital while, having failed her boards, April's future crashes down around her. Arizona encourages her childhood friend to undergo risky surgery, with life-altering consequences, and Ben plans a special suprise for Bailey.
- "So there's this bird, some sort of swallow I think. Every September thousands of them ditch rainy Seattle to winter in Mexico. These birds aren't dumb and every year crowds of people gather around Seattle to drink bear and watch the flocks take off. They call it the big migration."
- "I don't know how those birds do it? Travel thousands of miles without getting lost, banging into windows, being eaten by cats. But every spring they're always here, I guess they come back to what they know. People say it's pretty cool, watching them go. They say you can actually see the moment when, at some mysterious signal, all at once the birds decide to leave. So maybe I've been missing out. Whatever, there's always next year"
- "Sexy And I Know It" - LMFAO
- "Stone Of Suffering" - Get Set Go
- "Lightsick" - Zola Jesus
- "Graveyard" - Feist
This episode's title originated from the song Migration, originally sung by Nitin Sawhnhey.