The shocking end of the season in which it is revealed that John Doe is George, and Izzie collapses.
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A terrific scene from the Grey's Anatomy season finale. It wasn't traditional, but this Meredith-Derek "wedding" was very romantic just the same.
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In yet another sneak preview of the Grey's Anatomy finale, Izzie gets some advice on what to do from a patient.
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Alex asks Derek what to do ... not as a doctor, but as a friend.
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In an emotional sneak preview of the Grey's Anatomy season finale, Izzie asks for a vote on what surgical route to take.
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Owen talks to Cristina about his mom. And how he hasn't seen her yet.
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Mark wants Lexie to move in with him in this preview of the season finale ... and sort of gets shot down.
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Hunt and Callie treat a patient you may recognize (Zach Gilford of Friday Night Lights) and his character just wants to get back to Iraq!
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Grey's Anatomy Season 5 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)

Derek: I wanna be with you forever, and you wanna be with me forever. In order to do that we need to make vows. A commitment. A contract. Give me a piece of paper.
Meredith: I don't! I... I... I don't. I have post its!
Derek: (takes the post its and a pen) Ok. What do we wanna promise each other?
Meredith: That you'll love me... even when you hate me.
Derek: To love each other, even when we hate each other. (writes it down) No running. Ever! (Mer smiles and comes and sits in front of him) Nobody walks out. No matter what happens.
Meredith: No running.
Derek: (writes it down) What else?
Meredith: That we'll take care of each other, even when we're old, and smelly, and senile. And... if I get Alzheimer's and forget you...
Derek: I will remind you who I am, every day. To take care when old, senile, and smelly (writes it down) This is forever. (signs it) Sign.
Meredith: This is our wedding. A post it? (smiles)
Derek: Mhmmm. If you sign it.
Meredith: (signs it, and hands it back. Has tears in her eyes) Now what?
Derek: Now I kiss the bride. (They kiss)
Meredith: (smiling) Married.
Derek: (smiling) Married. (sticks their post it in Mer's locker) You see that? (Mer nods and smiles) Plenty of time.