I'll tell you what I really enjoy. We all go to the movies, we all watch television, we know what they're about, how they work. When the main character is a cop or a spy, it's very exciting, but I also very much enjoy when the main characters are nobodies - a trucker.

Castle isn't really affected emotionally by murder. He's thrilled about, 'Oh, my God, I wonder how this happened?'

When I was a waiter I was fired twice from the same restaurant. I guess I was that good of an actor but that bad of a waiter.

Castle is a guy living in a fantasy world. He's in his imagination, writing these stories of murder.

The trick is, when you grow up, find work that feels like play.

I love doing 'Castle.' We pump out 24 episodes in 10 months, and we work long hours. We do lots and lots of takes, and everyone there is a talent machine. It is a taxing endeavour to say the least, but when you get into a groove, it doesn't matter if you're tired, it doesn't matter if you're sick. You can do it.

I was shy. I was painfully shy, until fifth grade when I transferred to another school and befriended the class clown. And one day he was sick and I kinda stepped in for the class clown and I said, 'Wow, this is exciting, I'm a little bit nervous.'