Although this scene happens in silence, I did actually write dialogue for it. The actors are actually speaking it and it might stand as an explanation for some. In any case, that dialogue will never be written in the published screenplay for the film and I told the actors never to reveal it to anyone. They are bound to silence forever and I hope they will have forgotten it by now, because they didn’t know when they were shooting it what the significance of the scene might be.
Michael Haneke: The director on his film Hidden | Film | The Observer
Watched Caché last night and was totally captivated by it. It’s about hidden information on so many levels, it’s amazing. From this quote it seems Haneke went even further and started hiding info beyond the film itself. Devious.