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.

Improv as an actor makes you present in the moment. You listen, you're attentive. You're not acting so much as reacting, which is what you're doing in life all the time.

The nature of the beast is, art needs finance. That's how this industry works.

In all my characters, I try to find an iota of myself, and in Castle, I found a lot. He gets away with a lot, so that's fun.

I like to say there's certain things you can't take back: One of them is 'I love you,' and one of them is bullets.

My dinner spot is usually in front of the TV. I'll grill a steak and whip up a salad and watch 'Hoarders.' I love it because a) I'm kind of voyeuristic, and b) every time I see an episode, I go to the one room where all my unpacked boxes wound up, and I throw out a box of stuff.

You have a dramatic portion of your television program and you treat it dramatically, and then you have a comedic portion of your program, and you treat it differently. Why do you change who are between the two pieces? You're the same person. Just go.