Casting director Andy Pryor pulled together a list of girls that apparently all did a good job – Moffat was certainly impressed with them all and it seems he would have had a tough job before Gillan showed up.
“Karen was the very last person we saw and she just fitted better. She was just exactly right. And exactly right with Matt, in that she’s a bit kookier, I suppose. A bit madder.”
“This was his first experience of seeing what it’s like when somebody just completely nails the part,” he said. “To this day, I still don’t know how Karen didn’t know she had got the part. She didn’t have a clue.”