Grey's Anatomy

Season 7, Episode 13

Episode Title: Don't Deceive Me (Please Don't Go)

Air Date: 2011-02-03

Overview:

Derek breaks ground on his Alzheimer's clinical trial and Meredith can't help but feel left out; Bailey's attempt to take the hospital into the age of new media with live tweets from the OR does not go over well with the Chief; and Callie, Mark and Arizona must learn to navigate through the pregnancy together, which starts off with Callie driving her new obstetrician crazy.