Grey's Anatomy: Scoop on the introduction of a new doctor from E! Online's Kristin Dos Santos

Here's some scoop on Grey's Anatomy from Kristin Dos Santos' Spoiler Chat for Wednesday 11/28/12.

Robyn in Atlanta: I'll take some Grey's news if you have any.
Here is a peculiar casting call we need your help dissecting. Grey's is looking for a new doctor, in his late 40s, who will be around for three episodes. Seems like a fairly important character for later this season, right? Then why will we only hear his voice and never see him? Speculate away! 

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