Grey's Anatomy, Season 5

[Derek gets in the elevator, Mark is there]

Derek:
I need you to have sex with Cristina Yang.

Mark:
Good morning.

Derek:
Distract her, engage her, give her something to do after midnight besides call my girlfriend and wake me up.

Mark:
Yang?

Derek:
Mm-hmm.

Mark:
No. No, Too serious, humorless, un-fun. Not my type.

Derek:
Yang should be your type. She's intense, intelligent, complicated. She's like a single malt scotch and you're used to beer bongs.

Mark:
Callie Torres is no beer bong.

Derek:
Oh no, wait a minute, I get it. You don't think you have a shot. You're probably right.

Mark:
Oh, I have a shot.

Derek:
Then try it as a favor.

Mark:
No. I'm not your stud horse. You can't just... tell me who to sleep with.

Derek:
You slept with my wife.

[elevator dings]

Mark:
Yeah, I'll give it a shot.