Quite possibly my favorite scene with Doctor Donna =) I love her because for the first time 10 can have a companion who isn't falling in love with him. It took me a while to get over Rose Tyler but I really loved Donna Noble
This really does break my heart, cause you tend to forget that the Doctor was a dad once. And then you realized that he had a wife and kids, and he destroyed Gallifrey. Doctor Who punctures your heart, people.