"When the Doctor first offered to take Donna along with him, she said No. Big mistake, obviously. When she figured out that she had missed out on a once-in-a-lifetime opportunity, she didn’t sit around moping about what could have been. And, she didn’t just give up on it, either. She spent all of her time and energy trying to uncover alien conspiracies in the hopes that she would one day run into him again — and when that day came, she was totally ready. Donna Noble refused to settle for anything less than all of time and space, and, dammit, that’s what she got."