It'll be interesting to see if Denny sticks around. He's a really appealing character. I think Izzie is in real trouble. She's been doing just fine with using Alex. Denny is a whole other kettle of fish and there are all the ethical issues. Alex calling out George was brutal. But, it is what he needed to hear. I loved that he didn't go sulk and instead tracked down Dr. Torres. I also loved that he called her when they were standing ten feet apart. The Burke/Christina relationship is great. The scene at the end where they both left the hospital and ended up with their arms around each other in a casual, intimate way was great. So was Christina telling Burke it wasn't the night to give George an ultimatum after she'd seen the scene with Alex.