Tonight's Grey's Anatomy Episode: "An Honest Mistake"

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Happy Thursday! Tonight's Grey's Anatomy episode on ABC is "An Honest Mistake."

In this Season 5 repeat, one surgical legend hangs up her scalpel, while another Seattle Grace "god" finds that his abilities and confidence are shaken like never before.

Meanwhile, Izzie learns that one of her interns misfiled lab results that mistakenly "gave" an anemic woman cancer. That means someone else out there has the cancer.

Derek and Mark also get into a fist fight. It's not to be missed. If you missed "An Honest Mistake" or need a full rundown, it's here in our comprehensive episode recap.

Grey's Anatomy videos and pictures from the episode are live for your enjoyment, along with our music guide, Round Table and list of the best Grey's Anatomy quotes.

Thank you for visiting Grey's Anatomy Insider. Is it September 24 yet?

The Wrong Diagnosis

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.

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Grey's Anatomy Quotes

MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."
DEREK: "This thing with us is finished. It's over."
MEREDITH: "Finally."
DEREK: "Yeah, it's done."
MEREDITH: "It is done."

CRISTINA: "There's a club. The Dead Dads Club. And you can't be in it until you're in it. You can try to understand, you can sympathize. But until you feel that loss... My dad died when I was nine. George, I'm really sorry you had to join the club."
GEORGE: "I... I don't know how to exist in a world where my dad doesn't."
CRISTINA: "Yeah, that never really changes."