My favourite documentary, that’s lovely and everyone should watch, is called Water: The Great Mystery. It changed my perception of the whole planet more than maybe anything ever. Dr Masaru Emoto’s water research is very profound.

I’ve actually got a huge, huge list of documentaries that I’ve been meaning to watch, many of them collected from the guests in your Tools of Titans book. The one I did watch and enjoy is actually a series rather than a documentary; the remake of Cosmos. ... The topics he covered in those episodes was so stunning, and it was a great education for my son who is very, very into science himself. So that’s the documentary that stands out in my mind, probably the most interesting thing in the last five years, anyway.

I love—I’m a sucker for a rock doc. So I will watch pretty much any rockumentary that comes out. So I’ve—obviously, the king of them is The Last Waltz, which is a Martin Scorsese movie about the final concert put on by The Band. There actually is a new documentary called Once Were Brothers, I believe, and it’s also about The Band, Robbie Robertson.

My favorite documentary is one called Up. ... For your listeners, it’s a guy, Michael Apted who in 1964 decided to follow about a dozen or actually more kids from very different backgrounds and from the UK and some in orphanages, and some very well off to try and establish how much people are stuck to their context, to their social context. ... It’s quite an extraordinary way to look at humanity and see can people really escape their social constraints and their initial lay of life?

His name is Barry Humphries but you may be more familiar with him from his character, Dame Edna, a self-styled international superstar. I’d say he’s hitting pretty close to the genius description because back in the 1950s, he asked cultural questions that others neglected to ask or even consider.

There’s been a lot of stuff that I turned down.

I also like dogs and cryptic crosswords.

You now have to address the fact that we might live in so-called wealthy countries at the expense of people who live in poor countries. Our wealth is maybe dependent on somebody else from the poverty side of the equation, suffering on our behalf.

A lot of my decisions are made by instinct – you have a hunch.

A panic attack on stage during The Importance Of Being Earnest. Well, it felt like death.