Credit: Vivian Zink/ABC via Getty ImagesVivian Zink/ABC via Getty Images Photo: Addison Montgomery and Mark Sloan Have an Affair in Grey's Anatomy Season 3, Episode 2, "I Am a Tree"

Do you think you're the ultimate Grey's Anatomy buff? Remember all the details from every season? Test your knowledge with these questions about some of our favorite characters who are no longer on the show.