the live action part of the glass is painted black, more of the test footage is then exposed to adjust and confirm color matching and edge line up. so then we took it took it to cbs and they immediately saw it as a half-hour comedy; maybe do it with three cameras on tape before a live audience. their role was to transport documents, weapons, to transmit orders from one point to another. nevertheless, it proved to be a commercial success. the film is best known for its famous "lullaby of broadway" production number. differences concern the map, course, route choice, and control points. 