I loved the part in 111 where we learned about Malia, the love of Chin's life. They were simply precious together, until... well, the S2 finale/S3 premiere, that was incredibly sad...
But 112 was my favorite episode so far, the one where Victor Hess took Chin hostage and put a bomb on him. I loved that the team was willing to do anything to save him, that was wonderful. And I just adore those emotional scenes between Chin and Kono, they make me very happy. I admired Chin's stoicism in the face of his certainty that Hess would kill him, no matter what. He knew it and he was scared but he also accepted his fate and didn't want anyone to suffer or risk for him.
God, I adore Chin Ho Kelly. If you haven't noticed yet ;)