Billy Differ presents the best in musicals and this month he's out and about at the Edinburgh Festivals. He'll be chatting backstage to the young performers who've been causing a storm in Sunday in the Park with George; he'll be talking sin with the team behind Scottish Opera's new Kurt Weill production; and live-wire performer Ruby Wax will talking about Edinburgh memories, and the time she nearly bumped-off one of musical theatre's biggest stars. Show less