Picturehouse Poster – spot the difference

A few months ago it was announced that our local cinema – Bromley Picturehouse – was due to close. A campaign quickly started to save it, but it went nowhere. Not sure what's going to happen to it now; it's a beautiful 1930s art deco building and it deserves to stay as a cinema. Anything else would be an insult. Anyway, I started a few posters to aid the campaign; here's one of them. A few tweaks have turned it into a spot-the-difference. There's ten differences, plus seven Hitchcock references to spot. Enjoy!