Erica Hahn is the head of cardiothoracic surgery at Seattle Grace Hospital but that wasn't her first appearance on "Grey's Anatomy." See what you know about Dr. Hahn.
Teen comedies "California Dreams" and "Saved by the Bell" had the same creators and executive producers. They also had many of the same story lines. See if you can figure out how the story lines from "Saved by the Bell" and "California Dreams" match up