Blame it on the Yang

... Mouse? George meets a woman dressed in costume. Hey, it's Halloween and anything goes.

Shaggy, caring and pretty much awesome.

At least for the moment, O'Malley is staying composed.

He got jealous, which only made her more attracted to him in this episode.

George and Izzie got it on. Ultimately, he recalls this.

Meredith and George (he lives!) in a promotional photo from "Elevator Love Letter."

As they often do.

George and Izzie smile at each other in a photo from "Brave New World" from Season Five of Grey's Anatomy. These two used to be best friends, then hooked up, then broke up. What next?

Three eager interns

George, Derek, and a whole host of others look on.

Miranda is running the show today.