The Cabinet of Dr. Caligari behind the scenes gags

The film screenwriters Carl Mayu and Hans Genowitz mixed their personal experiences in the scripts, such as mental hospitals, sex crimes, and entertainments performed at festival markets.

The film originally invited Fritz Lange to be the director, but he declined.

The scene editing of the film just connects the pictures casually taken by the photographer Hamest.

In order to make it easier for the audience to understand the film, director Robert Wiene made the following changes to the original script, using a prologue and an ending to illustrate: The strange scenes that appeared in the film were sent to mental illness by The Cabinet of Dr. Caligari. The world seen in the eyes of a lunatic in a locked room. In this way, the original intent of the story has been changed. In the original script, authority was treated as a criminal madness, but now it has become the protector of reason.