The environmental movement, like all political processes, reacts best to disasters. But these are very slow, very gradual disasters in the making.

I don't get a sense that Cheers is revered the way it should be by [younger viewers]. In my mind, it's a show that should always, always, always be in the pantheon. But can it ever mean to future generations what it meant to us?

Individuals of all ages can make an important difference in the overall health of our ocean by the actions they take every day. Simple things like picking up trash on the beach, recycling and conserving water can have a big impact on the health of our ocean.

We need to start looking at having a way of managing the whole ecosystem, because you can't pick away at it piece by piece, you have to truly start being coordinated and managing our resources as a system. We haven't gotten to that point yet.

To the naked eye, our oceans are beautiful. But scientists tell us that all of the world's fisheries will collapse by 2048, unless we change how we manage them. Help protect our oceans so the next generation can also enjoy their bounty.

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.

Sharks have swum the oceans for over 400 million years, but we're threatening this critically important species for the purpose of making soup - it's sad and wasteful.