David Lindsay-Abaire

Film is mostly a visual medium, and so the director has much more control in terms of painting pictures and painting a performance. For theater, the director does everything he can and then says, 'Out you go,' and the actors are in charge of that stage every night.

Frankly, as much as I love to improvise, it hasn't been difficult to stick to the script on 'Mad Men.' The writing is so precise, and the story so carefully crafted, that I don't think there's room - or need - for ad libbing. I could never come up with dialogue as lovely as these writers do, anyway.