Derek froze, his face draining of color. "Addison. What are you doing here?"
While the interns gossiped about the outbreak, Izzie and Cristina were caught in their own ethical storm. They performed an unauthorized autopsy on a patient to prove his death wasn't their fault, eventually discovering a genetic condition that saved the man's daughter. Meanwhile, Derek was busy performing a secret surgery on Chief Webber, who was struggling with a brain tumor that threatened his eyesight. Eps9Greys Anatomy - Season 1
: Derek operates on Chief Webber's brain tumor in secret. Derek froze, his face draining of color
Watch a recap and review of the intense season 1 finale where secrets are finally brought to light: Eps9Greys Anatomy - Season 1