The arrogant, handsome intern who we first got to know as the man's man, both repulsive and irresistible to Izzie. The two had an on-again, off-again relationship that ended as Alex got caught sleeping with a nurse - in an attempt to regain confidence after "performance anxiety" problems with Izzie.

A former wrestler at the University of Iowa, he often tries to act more tough and aloof than he actually is. He and George O'Malley often clash due to their different personalities and also because Alex indirectly gave him syphilis (in Season One, George dated and slept with Olivia, the same nurse that Alex shagged).

After he and a visiting surgeon (Mark Sloan, the former best friend of Derek and lover of Addison) discussed his career prospects, Alex expressed interest in becoming a plastic surgeon. He gets that chance in Season Three, when Mark becomes a member of the staff - and makes Alex his personal lackey.

That means Alex Karev gets to know more about coffee than surgery. But he takes refuge on the "vagina squad" with Addison Montgomery, another attending who starts to fall for him before he turns her away. Later, he almost falls for a patient with a case of amnesia, but can't bring himself to commit to her either.

Will this patient - Rebecca Pope (also known as Ava, or Jane Doe) be the one to bring Alex Karev out of his shell at long last?

Alex Karev Quotes

Doesn't matter how tough we are, trauma always leaves a scar. It follows us home, it changes our lives, trauma messes everybody up, but maybe that's the point. All the pain and the fear and the crap. Maybe going through all of that is what keeps us moving forward. It's what pushes us. Maybe we have to get a little messed up, before we can step up.

Alex (narrating)

Izzie: They tried number 9? Who does 9?
Sadie: Well personally I'm a fan of 5, 7, 8, pretty much 12 through 20.
Meredith (laughs): I would try 15.
Izzie: Don't. Don't try 15. I would try 16. Yeah. I've never done that before.
Alex: You'd try 16?
Izzie: Uh huh. I would. I totally would. (Izzie and Alex look at each other then quickly leave the table)
Lexie: Um, don't do 16 too fast. It can hurt badly ... I heard.

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Grey's Anatomy Quotes

There's a reason I said I'd be happy alone. It wasn't 'cause I thought I'd be happy alone. It was because I thought if I loved someone and then it fell apart, I might not make it. It's easier to be alone, because what if you learn that you need love and you don't have it? What if you like it and lean on it? What if you shape your life around it and then it falls apart? Can you even survive that kind of pain? Losing love is like organ damage. It's like dying. The only difference is death ends. This? It could go on forever.

Meredith

Arizona: Oh my God! I mean, I understand why you're into her. She's hot. Wait, she likes you?
Nathan: What? I mean, I'm going to try not to be offended at that.
Arizona: No, no, no. It's just that Derek was--Derek was epic for her. They were the great love story. I mean, that girl's heart beat for Derek Shepherd. It just...it never occurred to me that she would ever be with anyone else. He was perfect. He was everything. That man turned her world. It...I spooked you. Don't be spooked.