Dr. Erica Hahn (Brooke Smith) is a long-time rival of Dr. Preston Burke in the field of cardiothoracic surgery, dating back to their days at Johns Hopkins Medical School, where she graduated second in her class - after Burke.

Erica was a cardiothoracic attending surgeon at Mercy West Hospital in Seattle. Back in Season 2, she and her old adversary Dr. Burke fought over a donor's heart.

Because of faulty information from Izzie pertaining to Denny Duquette's condition, he was given the donor heart, much to her dismay. But in an ironic twist, Dr. Hahn was asked to perform the surgery on Denny after Burke was shot outside the hospital.

In Season 3, Erica Hahn was contacted for a consult on Harold O'Malley's valve replacement after George lost confidence in Burke's condition.

She and Burke have a love-hate relationship, and while she would die before saying it in front of him, Dr. Hahn respects and admires Burke tremendously.

She told Cristina Yang - at the time Burke's girlfriend / fiance, that if she became half the surgeon Burke is, that's pretty damn good. In Season Four, with Burke having left Seattle, Dr. Hahn was hired by Chief Richard Webber to head cardiothoracic surgery efforts at Seattle Grace.

Erica Hahn Quotes

Erica: Is it me or there are teenyboppers staring at you?
Mark: I get that a lot. It started when I was their age, never really went away.
Richard: Is that so?

This is going to be so much fun.

Dr. Hahn

Grey's Anatomy Quotes

Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."

Meredith (closing voiceover)

Burke was- He took something from me. He took little pieces of me, little pieces over time, so small I didn't even notice, you know? He wanted me to be something I wasn't, and I made myself into what he wanted. One day I was me Cristina Yang, and then suddenly I was lying for him, and jeopardizing my career, and agreeing to be married and wearing a ring, and being a bride. Until I was standing there in a wedding dress with no eyebrows, and I wasn't Cristina Yang anymore. And even then, I would've married him. I would have. I lost myself for a long time. And now that I'm finally me again, I can't. I love you. I love you more than I loved Burke. I love you. And that scares the crap out of me because when you asked me to ignore Teddy's page, you took a piece of me, and I let you. And that will never happen again.