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.

I am forever grateful for Cheers.

I was going through so many changes in my life - separation with my wife, having an affair - that was all very messy and public. It felt like if I really wanted to rock my boat and make changes in my life and who I am and how I am, that would also mean moving on from Cheers.

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

It's not enough to have good thoughts for the world. You must get out there! It is also really important that each person realise their own worth. If you don't think you're good enough, how can you turn around and help save the world?

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.

We're not trying to reinvent the wheel; for any environmental organization to claim sole responsibility for any kind of victory is insane, because everybody attacks these problems as a group.