A rising young stage comedian, who is about to receive his profession's award as Most Promising Newcomer, dies sensationally on stage at the start of his act; as he picks up the mike, he is electrocuted. Faulty wiring seems to be the cause; no one person's to blame; a verdict of death by misadventure is returned at the inquest. But Simon Brett's actor/detective, Charles Paris, who has already solved some highly complex murders in 'Cast…