The document discusses the role of the Inspector in J.B. Priestley's play "An Inspector Calls". It states that the Inspector controls the development of events in the play, dictating who speaks and when. He also controls who may leave or stay, and who will see evidence. The Inspector is described as massive, solid, and purposeful. He looks hard at each character before speaking, giving the impression that he sees through to their real selves beneath the surface. This contrasts with the thoughtlessness of each character's treatment of others discussed in the play.