The list of Grey's Anatomy guest stars keeps on growing.

On the heels of the arrival of a new head of trauma, Dr. Owen Hunt (Kevin McKidd) comes word that another fresh face will soon be scrubbing in at Seattle Grace.

Jessica Capshaw (The L Word, The Practice) will play Dr. Arizona Robbins, a pediatrician who’s called in to consult on a case and ends up butting heads with Dr. Bailey.

According to the L.A. Times, Capshaw is signed for at least three episodes, though that could lead to more. She will make her first appearance midway through Season 5.

Jessica Capshaw is the latest to sign on for a high-profile Grey’s Anatomy guest stint.

Both Mary McDonnell (Battlestar Gallactica) and Melissa George (Alias) begin their runs in the November 13 episode, called "These Ties That Bind."

They will play a cardiac surgeon with Asperger’s syndrome and a bisexual intern who shares a past with one of our favorite characters, respectively.

Combine that with McKidd and another cameo by Jeffrey Dean Morgan (the late Denny Duquette of Season Two fame) and we've got quite the guest roster this fall.

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