It may sound silly, but my favorite Donna moment is from Partners in Crime when she's miming to the Doctor. It's just too funny! I love Catherine Tate best when she's being hilarious, and she is nothing but hilarious in that scene. I especially love how you can tell exactly what she's saying for most of it and I LOVE the freaked out look on the Doctor's face as he watches the mime show. You go Donna!
So what about you? What's your favorite moment featuring Donna?
Tomorrow: What's your favorite Amy moment?