Furious at Durand-Durand’’s betrayal, the Black Queen walks to a set of five shoulder-height levers, each baroquely shaped, transparent, and hinged to a base on the floor. She pulls the middle one, and a bright white light below the base begins to glow. She then pulls the first lever. She glances at the fourth, but then changes her mind and pulls the fifth one, explaining that she is unleashing the Mathmos to devour the city. The Queen’’s brief hesitation implies that this isn’’t just an interface, but a self-destruct mechanism that must be activated in some particular, secret order to take effect. Upon completion of the sequence the city begins to fall into the liquid creature, Mathmos, that lives beneath the city.


The ritual interfaces

We know in the film that Control has been working behind the scenes long before the event takes place. The Chem department, for example, has somehow gotten Jules to bleach her hair, and the hair dye “works its way into the blood” as a way to slow her cognition, and make her conform more the Whore archetype. Additionally, they have been lacing Marty’s marijuana to keep him dazed & confused. (Though, key to the plot, they missed his secret stash.) There’s even an actor placed en route to the eponymous cabin who unsettles the victims with his aggression and direct violent insults to Jules, setting the stage for their suffering. Though these things occur “off stage” of the actual cabin (and the Chem team works off screen), they help tell the story about how deeply embedded Control is in the world, and set the stage for the surveillance interfaces on stage.

Marking the deaths: on screen & ritually

The goal of the scenario is the suffering and death of the victims, in the right order. To provide a visual marker on the monitoring screens, a transparent red overlay is placed over victims who are believed to have been killed.

The choice of red has a natural association with the violence, but red has a number of problems. Visually, it vibrates against blue (according to opponent process of color theory, the red and blue receptors in our retinas are in the same place and can’t perceive both at the same time). It’s also typically used to grab attention, which in this case is the exact wrong signal. Jules is no longer in the picture, and so specifically no attention is needed for her. Better would be to dim her section on the monitor, or remove her altogether, if marking progress is unimportant.

Hadley orders Thorazine

In addition to marking the deaths in the digital interfaces, the deaths must be marked ritually for the system to work. To this end, Sitterson and Hadley act as the human interface that transfers the information from the electronic systems to the Bronze-Age mechanical systems behind him. Though this could be accomplished mechanically, there are ritual words that must be spoken and an amulet that must be kissed by a supplicant.

Sitterson, the senior of the two, recites, “This we offer in humility and fear / For the blessed peace of your eternal slumber / As it ever was.”

After these ritual actions, Hadley raises a roll top wooden panel to reveal a simple switch. Pulling it down initiates a chain of mechanics that ultimately break a vial of blood into a funnel, which channels the blood into grooves carved into a sacrificial slab.

Sitterson and Hadley mark the first sacrifice

The roll top door acts as a physical barrier against accidental activation, and the mechanical switch requires a manageable, but deliberate, amount of force. Both of these features in the interface ensure that it is only done when intended, and the careful mechanical construction ensures that it is done right.

The plastic educator

Dr. Morbius introduces the Krell “plastic educator,” saying, ““As far as I can make out, they used it to condition and test their young, in much the same way as we once employed finger painting among our kindergarten children.””

Morbius grasps the educator’s head mount.

The device is a station at which the learner sits. There is a large dashboard before him, in turn before a space enclosed in a tetrahedral encasement of plastic. To his right is a large column made of plastic with red and yellow graduations running up the side. Inside the column is a strange shape like a lathed accordion, terminating in a pulsing ring that indicates a level against the graduations. An arced panel hangs from the ceiling with other printed graduations with lines of light above and below. Blue neon squiggles blink randomly along the walls.

Morbius demonstrates proper placement of the educator interface.

To activate the station, the learner grasps a pair of curved metal arms, which are connected at a hinged base and tipped with crystal orbs. He leans forward, rests his forehead on a third arm, and pulls the pair of arms to rest on his temples. He turns a pair of dials on the dashboard before him, and the crystal orbs on all three arms glow, indicating that the headset is operational.

Morbius points to the intelligence indicator.

Adams and Doc try to guage their own IQs.

The device’’s immediate result is that the accordion shape inside the column rises such that the lit ring indicates the intelligence of the user. (To Adams’ and Doc’’s dismay, their readings are much lower than Morbius’.)

With the press of a lever Morbius manifests a thought visually.

The primary function of the device is for the user to make a thought of theirs manifest in the tetrahedral space. The user concentrates on the thing, and then pulls a lever at the base of the headset. A red ring at the base of the headset illuminates, and a material appears above a pedestal at the base of the tetrahedron. By concentrating, the user shapes this material into the desired thing. Morbius shapes it into an image of Alta. The image is a scaled, translucent, volumetric display of Alta, which moves and smiles just as she would.

The projection ceases immediately when the mechanism is removed.

To stop using the device and shut down the projection, the learner simply lifts the lever and removes the headset from contact, and the orbs, the red ring, and the volumetric projection all fade within moments.

Finished with his demonstration, Morbius turns the educator off.

Turning the dashboard off requires a user to turn two free-spinning dials that sit to each side of the headset inwards. The lights of the dashboard fade.

“Safety” “engineering” in the land of Metropolis

You know, sometimes you get the inkling that the bad guys just want to fail. Joh, the alleged brains of Metropolis, seemed to take a special delight in having his engineers develop machines that would ultimately doom his precious upper class.

A laborer fails to monitor the temperature of the M-machine.

So you’’re one of those engineers, mopping your brow and staring at whatever the Metropolis version of AutoCAD is, and you have this problem. When the machine gets too hot and close to failing, you need to vent some of that deadly, deadly steam somewhere to buy your guys some time to try and fix things before lots of people die and your civilization comes crashing down. OK. So, where to put that vent? Well, you consider putting it somewhere safe. Nonsense. Let’’s instead turn that pipe this other way, and aim it like a cannon directly at the guys who might fix the problem. Be sure and jot a note at the bottom of your drawing that this will piss a lof of the dead guy’s’ friends off so they’’ll revolt against you.

Machine-Maria disables a safety switch.

But OK, I hear you cry, these things are complicated, and perhaps that steam thing was just an oversight. People get busy and maybe it was rushed into production. How then do you explain the presence of a single, large, and easy-to-pull switch, the sole purpose of which is to immediately overheat and explode the one machine that’’s keeping the working class and their children from being crushed under a wave of water? That’s not a slip-up. Somebody had to put that there, and somebody else had to approve it. Not to name dystopian names, but we’’re looking at you, Joh Fredersen. Maybe that’s the great secret under Metropolis: Joh is the unsung good guy of this tale. The one guy who could mastermind the takedown of the terrible, oligarchical mess, all from the inside, and using his goofy do-gooder son as a pawn.

Tool of liberation

Maria’’s heroism in saving the children of the Lower City from flooding is aided by what may be only positive depiction of a technology in the film.

Maria summons the children with the gong in the town square.

To summon the children so that she can direct them to safety, she climbs a structure in the center of the town square. There she struggles with a very difficult-to-budge lever, but when she finally does so, it sets a loud gong to ringing. In keeping with the film’’s theme, this brings people together so they can be saved.

Rotwang’’s Maschinenmensch (Machine-Man)

Rotwang’s Machine-Man is the most magical technology seen in the film. This is understandable since there the only common precedent available to the audience were stories of golems and imps, soulless and wicked servants out to wreck havoc at their master’s bidding. Despite this imp paradigm, many of the interfaces around the Machine-Man are worthy of note.

Rotwang reveals the Machine-Man.

When Rotwang first reveals the Machine-Man to Joh, he does so with a dramatic yank of a curtain to the side. There sits the automaton, in a throne before a catwalk. In response to the curtain’s opening, the catwalk gradually illuminates. Did the Man-Machine turn the lights on? Was it a “curtain switch?” The movie gives no clues, but the lesson is clear. Light signals power, and the Machine-Man is imbued with a lot of it.

The Machine-Woman awaits Rotwang’s instructions.

The Machine-Man as Joh meets it is entirely machine in appearance. (Beautifully designed by Walter Schulze-Mittendorff. This piece of sci-fi is so iconic and seminal that it warrants its own Wikipedia page.) At Joh’’s instruction, Rotwang gives the Machine-Man the outward likeness of Maria. How he is actually able to accomplishing this is vague, but note that as he twists up the power, more and more bars illuminate at the foot of the table. An early establishment that, as power increases, so does light.

Rotwang powers the transformation table.

This “light = power” theme is reinforced a number of times throughout this sequence.

Some machine glows as Rotwang turns it on.

With a switch the transformation begins.

Rotwang increases the power to the transformation table.

What does the tall tank, the arcing sphere, or the large wafer switch do? We don’’t know. But with the flick of a switch, something glows, and even without any sound to tell us, we know that he’’s summoning a great deal of power for what he’s about to do next.

Machine-Maria devises her saboteur’’s scheme.

Machine-Maria looks nearly identical to the real Maria. But in seeking to make the differences clear to the audience, actress Brigitte Helm needed to supply some kind of uncanny valley a century before the term was invented. Her response, which underscores the “evil twin” nature of Machine-Maria, was to adopt sharp, precise movements, an under-the-brow stare, and asymmetry. These simple cues let us know in a few seconds that she is not human and not to be trusted.

On the pyre, Machine-Maria reverts to her original form.

Machine-Maria’s death also underscores its deeply magical roots. When burning on the pillar, Machine-Maria transforms back to her original, machine-like form for little given reason other than her spell has been somehow broken.

Lower City oppression

> Metropolis overview

Laborers in the Lower City live lives of horrible dehumanization, tending to and dying in the maw of the machines. Much of the technology in the early part of the film highlights this aspect of the world of Metropolis.

One shift files in as the other files out.

Access to and from the machine halls are carefully controlled. Between shift changes, laborers line up in regimented rows before the gates. A device on the wall adjacent to the gate shines two square lights up top. When that light extinguishes and the circular light illuminates, the laborers know to begin walking through the gates.

They trudge to large elevators, where an operator turns a crank wheel to raise the containing gate and lower the elevator. This elevator operator keeps his eyes on a gauge positioned uncomfortably high on the wall above the crank.

Freder encounters the worker’s city.

A laborer fails to monitor the temperature of the M-machine.

One exhausted laborer has to control the temperature of the machine. He stands before a panel where a thermometer is mounted in the dead center. Its markings tell him the acceptable maximum temperature. A row of flanges and levers line the lower part of the wall. Each has a lightbulb above it. When the lightbulb illuminates, the laborer must activate that flange. The pattern of blinking lights is difficult to keep up with and the work exhausting.

11811 struggles to keep up with his task at the machine.

When Feder returns to the Lower City, he sees a laborer tending a particularly pointless machine. He holds two arms on a human sized, clock-like face. Instead of numbers, the face is ringed by lightbulbs. Every half a second, the two blinking bulbs will dim, and a new completely random pair will begin blinking. The laborer’s task is to turn the hands such that each one points to the blinking lights.11811 struggles to keep up with his task at the machine.

Feeling for his brother, Freder offers to take 11811’s place at the machine.

Though too fast and random to be easily sustainable, the task itself is so apparent that Feder can offer to stand in after only a few seconds of watching.