The Cabinet of Dr. Caligari is a 1920 German silent horror Film….The quintessential work of early German Expressionist cinema, it tells the story of an insane hypnotist (Werner Krauss) who uses a brainwashed somnambulist (Conrad Veidt) to commit murders.

https://en.m.wikipedia.org/wiki/The_Cabinet_of_Dr._Caligari
https://youtu.be/-lfEp5t2FlE?si=fxobYIPzJvtj0dRS
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