Maurice Denham, Roger Delgado, David Spenser, and Miriam Margolyes star in an atmospheric BBC full-cast drama from Doctor Who writer Victor Pemberton. "Listen! Quiet! Everybody stand still for a minute. There's something. Can't you hear it?"
During an abnormal heatwave in March, the air becomes thick and dull. Nothing moves, and you can almost hear the silence. Something was bound to happen.
