This week at the Tribeca Film Festival in New York I went to the world premier of a documentary about the creative process. Kevin Spacey and Sam Mendes produce Shakespeare's Richard III together, and then take it on a world tour. Called Now: In the Wings on a World Stage, it's a glossy but rich lens on the magic of live theater. Re-set in the 1930s, and coincidentally playing during the Arab Spring, the production depicts a man who would do whatever it takes to become head of state. Spacey and Mendes talk about the difference between theater and film: in theater every performance is new and unique. Hence the title: Now!

In a separate interview about being a theater director, Sam Mendes says you have to love the process of creating: "One of my favorite quotes from Hamlet is Polonius: 'By indirections find the directions out'. "