1922 – Germany was in political turmoil and spiralling into a hyperinflation crisis. Meanwhile in cinema the German Expressionist movement was coming of age with the release of FW Murnau's Nosferatu and this, the first in Fritz Lang's series of epics Dr Mabuse, der Spieler. While perhaps not as classically expressionist as Murnau or Robert Wiene, Fritz Lang arguably put his finger on the mood of times better than any other. With Mabuse, his unique style develops to convey a picture of the chaos of the era.

The opening sequences of Dr Mabuse are evidence of screenwriter Thea von Harbou's growing strength as a storyteller and Lang's economy of expression. The first shot – a close-up of Mabuse's hand, holding cards showing his various disguises – presents and defines the title character. A frantic, rapidly cut action scene then hooks the viewer, whilst introducing us to Mabuse's network of minions. After that, we see Mabuse's elaborate scam at the stock market. In one particularly striking image, the crowd of traders panic and jostle, whilst Mabuse stands calmly on a pedestal above them – a perfect metaphor for his position of power amidst social chaos.

At one point in his youth Lang trained as an architect, and this fact is central to his style as a director. There are hints of this in his earliest films, but in Mabuse the architectural touch is fully matured. Throughout, the set design and décor is almost more important than the actors. Whereas other expressionists would evoke mood most frequently through use of light and shadow, Lang does it primarily through use of space. He composes shots in straight lines and geometric patterns, occasionally seeming to form eyes or faces. Often characters are dwarfed by the sheer cavernous size of the rooms they are in. Also look at how many scenes take place on a stage or lecture hall, and how Lang contrasts opposing shots of speaker (or performer) and audience – a metaphor for master and masses. He even has Mabuse sitting at his desk facing the camera, as if to make the real-life viewers his audience – a touch Lang used a fair bit throughout his work.

A frequent complaint about Dr Mabuse is its gargantuan length and I have to admit it does drag in places. Lang's following silent features, although also very long were extremely tight in structure and worked like a classical symphony in the way different parts complemented each other. Dr Mabuse is not quite up to that standard yet. While some of the individual acts are well-balanced little dramas in themselves, as a whole it is a little uneven. Mabuse also suffers from wordy title cards and a lack of convincing action sequences – again, problems that Lang would have solved by the time of Metropolis. It's worth remembering though that on its original release parts one and two were shown on consecutive nights, and it's much easier to digest this way. I wouldn't recommend any first-time viewer try to tackle the whole thing in one sitting.

Holding the whole thing together is a mesmerising performance from Rudolph Klein-Rogge in the title role. While acting in Hollywood was becoming increasingly naturalistic at this time, Germany was a little way behind and performances still tended to be a bit too theatrical and exaggerated. Lang however softens the impact of melodramatic acting by never letting the characters get too realistic in the first place. Cinema was like a comic-book for Lang, in his urban thrillers as much as in his exotic adventures, and this approach saves Dr Mabuse from becoming too strained and ridiculous.

Although it's not as polished as any of his later silents, Dr Mabuse was perhaps Lang's most influential film. The idea of revealing the identity and methods of the villain to the audience was no doubt a forerunner of Hitchcock's mode of building suspense. A young Sergei Eisenstein was given the task of cutting a shortened version of Mabuse for the Russian public, and the way Lang imbues each shot with meaning may have contributed to the concept of intellectual montage. This is not to mention the impact of the Mabuse character on generations of cinematic villains to come. Dr Mabuse, der Spieler is a far from perfect film, and can be tough to watch although it's not as dull as some would claim, and it's certainly a key film in several strands of cinematic development.

• Soviet editors re-cut the Dr. Mabuse films into one shorter film (see Alternate Versions). The lead editor was Sergei M. Eisenstein.
• Fritz Lang originally wanted the actress portraying Venus to be completely nude. When the first take was completed, he didn't like how the woman's pubic hair looked, and ordered her to shave it off. The actress indignantly refused, sending Lang into a tantrum. Eventually, a compromise was reached when a small strip of cloth was draped over the offending hair. This scene was predictably removed from the revival versions that circulated throughout the 1940s, 1950s and 1960s, and has only recently been part of the film in the rare showings of the Fritz Lang archives' complete copy of Dr. Mabuse.