I don't know that 'NCIS: Los Angeles' is a complete reinvention, but I'm playing one of the guys in charge this time. Before I'd be cast as a young impressionable character. I think part of that is just being more mature.

L.A. just doesn't seem real to me. Chicago does. My real friends are there. It's home.

I think it's easiest to teach by example. My dad didn't tell us to work hard; we just saw how hard he worked. I know I have shortcomings - like a short fuse - but I've learned you can't come home from a long day of work and snap at the kids.

I knew when I got into this business I couldn't have it both ways: I could live the playboy lifestyle, which is not a bad thing to do, or have a traditional family life, which is how I grew up. And that was more important to me.

I definitely had those moments, like any actor, when you get anxious and think, 'When am I going to work again?' But I would feel that way even when I had every offer in the world coming to me. Then I became a father and I felt a little more of the anxiety that came with the responsibility of being a parent.

My daughter Lily's the oldest, and by the time she was six months, we just had books of photos. Poor little Maeve, who's six months old now My mom hasn't met her yet, and last night she said, 'Show me some pictures!' I'm looking through my phone like, 'Well, I got a couple, but they're from two months ago'

I'm from a big family - I'm the youngest of seven - and my wife is one of four. So we always wanted a lot of kids. It's what we're used to, and for us it's what life is all about.