The race for the Chief's position is on, as Derek, Preston, Addison and even Mark compete for Richard's affections. We'll see who emerges as a contender in this four-horse race.
Meanwhile, a surgical patient endangers the lives of everyone around her, and Meredith's Alzheimer's-stricken mother, Ellis (played by the Emmy-nominated Kate Burton), experiences a change in her medical condition and becomes lucid.
How this affects the younger Dr. Grey - as well as Ellis' one-time lover, Richard, and his decision to retire - will be very interesting to see.
Lastly, Cristina and Callie consider the marriage proposals left on the table at the end of last week's show. According to the official Insider poll, 86 percent of you believe we'll hear at least one "yes."
Here's ABC's preview of tonight's show...
As always, we'll have our episode guide posted right after the show, and begin compiling our list of quotes, image gallery, and music guide. Check back often, and thanks for watching along with us here at the Insider.