Theatres, actors, critics and public are interlocked in a machine that creaks but never stops. There is always a new season in hand and we are to busy to ask the only vital question which measures the whole structure. Why theatre at all? What for? Is it an anachronism, a superannuated oddity? Surviving like an old monument or a quaint custom? Why do we applaud and what? Has the stage a real place in our lives? What function can it have? What could it serve? What could it explore? What are its special properties?