Continuity mistake: At the beginning, the way Holmes holds the photo is different in consecutive shots. (00:01:00)
Character mistake: The American Flag is hung improperly on the wall. The Flag's union (stars) should be at the top, to the observer's left, but it's to the observer's right. (00:06:38)
An Unnatural Arrangement - S2-E6
Continuity mistake: At the start, when The Woman first fires at the door the holes are quite dark and splintered. Then when she moves to pick up the phone the holes look far neater, like they've been drilled.
Answer: I'm the same person who asked this question. I discovered it was Molly Price whom I recognized from Third Watch.
Cathrine R
It should be noted Donna was Jim Fowkes‘ secretary. Donna killed Peter.
Bishop73