Caroline, or Change is a musical of two quite different acts. The first had enjoyable parts but felt slow and left me feeling lukewarm. It was only during the second act that it shifted up a gear and an interesting show began to reveal itself. It became about much more than just an angry black woman in a low paid job, but a multi-layered insight into the feeling of change which rippled across America in the 1960s. It’s not your average feel-good musical but one that gets the brain ticking.