SEPINWALL: There’s always a playfulness to your performance as Roger, and it felt like that kind of permeated the whole episode. Was that intentional? Was a lot of that already in the script? 

SLATTERY: There’s the sequence where Peggy peeks over the transom at Don after his secretary has quit and thrown the cigarette lighter at his head. It’s there in the script, but we were there and we were shooting, and Lizzy Moss, who’s a very funny person, was up on the desk. The script just had her there in the window, and we started fooling around with it, and she peeked up, and he turned, and she ducked down. There is room to play. Matt has a very distinct vision about what he wants, and it’s very specifically written. But within that structure, there’s room to interpret, and you can get some shots, if you have time, that are going to contribute to the whole thing.