When we are in pre-production, this is the best job in the world. Working 10 to 7, sitting around and brainstorming with the other writers, making things funnier and writing and rewriting scenes - that's as fun as it gets.

The thing about many celebrities - not all - is that they're fantastic actors. If we've created a really juicy role, it just feels like a fantastic actor should be playing the part. If it's a long enough part, we consider anyone. If it's a single episode, we don't usually let a single actor on. Because that' s just stunting.

Catherine Tate was a proven comedy actress from a comedy background with great taste. I knew her work, and was an incredible fan.

Comedy becomes intensified in short scenes.