We are so arrogant, we forget that we are not the reason for evolution, we are not the point of evolution. We are part of evolution. Unfortunately, we believe that we've been created to dominate the planet, to dominate nature. Ain't true.

We have a project with Unocal here in Los Angeles, where we as an environmental organization, the oil company, and the state all get together to promote the recycling of used motor oil.

You have to work with the auto industry, the oil companies, you have to work to develop renewable fuel, whether it's solar or different kinds of fuel.

The biggest danger we face is overfishing. We literally could fish out our oceans, some scientists believe, in the next 40, 50, 60 years. We are fishing out the top of the food chain, and it's pretty crucial because about 200 million people depend on fish and fishing for their livelihood, and about a billion people, mostly in poorer countries, depend on fish for their protein. So this is a big problem. Good news is, it's fixable.

One of the ingredients that made Cheers work so well was the great ensemble of actors we had. That's the case with any good series.

My job playing Sam Malone was to let the audience in, to love my bar full of people. And that informed my life. I mean, we're so different [in the cast], some of us. Miles apart. [But] when I see anyone from those days, I tap into that instant love for them.

One person goes off and works in Houston the other person goes off to London and you're on the phone to each other and somebody is paying you to kiss somebody else. It's very bizarre being an actor.