A '2001' connection?
There is a scene where a highly secret discussion takes place deliberately out of earshot. But not out of sight. Watching is an able lip-reader who thus is able to discover the biggest secret of the movie. The shot is framed so that the lip reader is out of focus in the centre of the frame and in close up is just the mouth and chin of one of the speakers to the right.
I had certainly seen this before but in another very very different movie. Only the lip reader was a tv camera and the brains behind it was a computer, HAL. The movie, 26 years later, was "2001".
Coincidence?