Of all the movies movies Katie was forced to watch when she studied cinema - this is the one she's actually enthusiastic about. M is a 1931 movie by German director Fritz Lang that revolutionized the art form.

So many of the tricks and techniques you see in nearly all modern movies were first used in this one. And you can find the whole movie on YouTube so get watching :)

BTWs include:

• Nicolas Cage
• How to fake being a silent movie pianist
• Trolling Nazis

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