You never see them on the proscenium. When the curtain rises, they quietly slip behind the wings and get down to business. They, literally, train the spotlight on the actors and yet, remain at a distance from one themselves.

Anadi Nagar, 25, composes music for theatre. He knows his music cannot overpower the play. "People need to come out of the theatre appreciating the play, not the music alone," he says, "But there is something about theatre that makes me want to do it." The show must go on. And on World Theatre Day, we speak to four backstage heroes who play their part to make sure it does.