Rapper-turned-comedian Doc Brown is in a Turkish cafe with a pot of tea, explaining the genesis of his collaboration with shark-toothed showbiz deity Ricky Gervais. "Ricky called me up out of the blue, said he'd been watching clips of me on YouTube and did I want to open for him on his European tour? I thought it was a prank until I heard that laugh, then I knew it was really him. We hit it off, then he crowbarred me into 'Derek' and we wrote 'Equality Street'"...