TV acting is so extremely intimate, because of the peculiar involvement of the viewer with the completion or "closing" of the TV image, that the actor must achieve a great degree of spontaneous casualness that would be irrelevant in movie and lost on the stage. For the audience participates in the inner life of the TV actor as fully as in the outer life of the movie star. Technically, TV tends to be a close-up medium. The close-up that in the movie is used for shock is, on TV, a quite casual thing.