Derek froze, his face draining of color. "Addison. What are you doing here?"
The season one finale of Grey's Anatomy , titled "Who's Zoomin' Who?," originally aired on May 22, 2005. The episode is famous for its massive cliffhanger: the arrival of Addison Montgomery, Derek’s secret wife. Eps9Greys Anatomy - Season 1
: Izzie and Cristina risk their careers to find the truth about a patient's death. Derek froze, his face draining of color