When I go to a sci-fi convention, oh God, it's the closest thing to being a rock star I will ever know in this life. I want to be a rock star, don't you? It's a good thing to be, a rock star.

I think TV has been a little bit irresponsible in how they portray these people because homicide detectives are not brooding, tortured souls who are stained with the stink of the city and who have blood on their hands. They are real, live people that are incredibly entertaining.

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

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

It's a thrill to be a fan amongst fans.

It's a trap I've fallen into earlier in my career - trying to be liked. Don't do it. When I watch TV and I see someone trying to make me like them, acting cute or quirky or goofy, I'm not impressed. Don't act like America's watching you. Just latch onto your character. Characters are flawed. Be unlikeable. Be flawed. Be a person.

The secret to comedy is not playing the comedy, but actually playing the situation, playing the drama of it.