Callie and Arizona are getting married this week on Grey's Anatomy.

That's been common knowledge for weeks, but there's a lot more going on in "White Wedding" than you might think, both regarding Calzona's nuptials and elsewhere.

For instance, the adopted Mcbaby topic arrives a week earlier than expected for Meredith and Derek, as the latter flat-out asks if they can bring home one named Zola.

Think she'll agree? Listen to Derek's pleas and you might cry:

Follow the jump for four more clips from the May 5 episode, in which Alex looks to have the Chief Resident spot locked up, much to his colleagues consternation.

Also, there's plenty of tension on the wedding front. That's typical for a family event of this nature, but with two brides and one Mark Sloan, this one's a bit unusual:

Share your thoughts on these sneak peeks and your predictions for this momentous episode of Grey's Anatomy by leaving your comments below!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.