Being in the industry, I've seen many situations where someone will get the call from the network where they say 'You guys have 5 episodes to wrap it up.' Then all your long-term story arcs gotta get wrapped up in five episodes because that's how many episodes you got left. I would hate to see that happen to 'Castle'.

Thank God there is a such thing as hiatus. We got the first 'Dr. Horrible' done in six days, we banged it out.

I don't spend a lot of time online.

My guiltiest pleasure? 'Untamed & Uncut'. Videos of people being attacked by animals. Yeah. I don't know why. I just love seeing guys who say, 'I'm gonna stick my hand in that crocodile's mouth and see what happens.' And then it snaps down on them. There you go - that's what you get! It's a wild animal, my friend.

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

I want my job to include a little adventure, a little more of a heightened reality than what I'm actually living. And 'Castle' has that. He gets this opportunity to tail these homicide detectives, and he's driven by that. He's a little immature, but he's obviously loving life.

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.