Are you a book reader? When did you learn about the Red Wedding and Catelyn's fate?
I read the series so I knew what was coming and I knew how many years I signed on for. It makes for dramatic reading and I'm sure it makes for dramatic viewing as well. I haven't watched it—I don't know if I'll be able to watch it, but I hope we did it justice because it does have a knock-on effect.
Having read the book, did you approach the scene differently?
No. I used the book as a reference. Sometimes David [Benioff], Dan [Weiss] and Bryan [Cogman] take from the books and sometimes they don't. And you're in the third year of a production so you know your character at that point. If I want to get inside what George [R.R. Martin] is thinking, I go back to the book, but mainly it's David and Dan's thinking and my interpretation of that.
What was going through Cat's mind when the "Rains of Castamere" start to play?
I remember shooting that and having to turn. She's thinking, "What is this music?" It says something ominous to her, like something has walked over her grave; her hackles are up. But she doesn't know what it is because she's an honorable human being. The last thing on her mind is that Walder Frey would use this occasion to seek his revenge.
What is she thinking when she appeals to Walder to let Robb live?
All of Catelyn is about keeping her children alive and getting them together again. She's bartering with her own life in the hope that her son is going to get away. And she does have Walder's wife and a knife at her neck. But Walder Frey is not the same person as Catelyn Stark. He is driven by anger and revenge.
Can you give an idea of what it was like filming that day?
We had a week to shoot the whole sequence, and we shot it chronologically so throughout the week, you knew we were coming to the end. It's incredibly emotional—because of the subject matter and the mindset and physical state you have to get yourself into, the breathing and thought process. You think, "What is she trying to achieve here?" She's emotional, yes, but at the same time she's trying to be rational. She has to listen to what Walder Frey is saying and she has to keep her wits about her. She tries everything with this man in order to save this son but he's without care. She doesn't know it was already planned.