I just finished watching the extras on La Bete Humaine, and this is the reason I love Criterion. The extras were incredible. There was a short 7-minute clip from some long-forgotten French TV show, made in the 1950s, that had Jean Renoir once again directing Simone Simon in the scene leading up to her death. The give and take between director and actress was wonderful.
There was another program from French TV on adapting Zola for film. They used La Bete as the start of their discussion but it went on to include talk of Fritz Lang's version of the same tale, Human Desire, with Glenn Ford in the lead role. I saw the film in the last couple of years and forgot all about it, until this mention.