When Grey's Anatomy returns Thursday, a familiar face makes a triumphant and unexpected return.

Also, many miles away, another familiar face is asked to turn that frown upside down.

Cristina Yang is miserable in Minnesota, which her new boss (guest star Steven Culp) picks up on and seeks to change. Begrudgingly (and hilariously), she agrees, but that external smile belies deeper issues.

Back in Seattle, Alex gets a lecture from Callie about not sleeping with his intern, and none other than Dr. April Kepner shows up at the hospital, having been brought back by Hunt. The team is surprised to say the least, and she's clearly taken aback herself when she realizes Jackson changed his mind and did not go to Tulane.

Watch the awkwardness ensue in three clips from "Love the One You're With" below:

 

Grey's Anatomy 'Love the One You're With' Clip - Turn That Frown Upside Down!

 

Grey's Anatomy 'Love the One You're With' Clip - Alex, Callie and Jo

 

Grey's Anatomy 'Love the One You're With' Clip - I Am Back, Too

Source:
http://www.tvfanatic.com/2012/10/greys-anatomy-sneak-peeks-im-laughing-just-not-externally/