Depolarizer

Zoe identifies the depolarizer as a small wearable device positioned at the back of the neck. It blocks the Cybermen's hypnotic control signal broadcast through satellites and everyday electronics. In the laboratory, the Doctor tasks Zoe and Professor Watkins to construct it urgently, thrusting them into the invasion's front line as they scramble amid whirring equipment and rising panic.

3 appearances

Purpose

Jams Cybermen’s hypnotic control waves to prevent human enslavement via global signal.

Significance

Zoe's insight sparks proactive resistance, transforming UNIT's scramble from defense to offense and positioning the device as the key to thwarting worldwide domination.

Appearances in the Narrative

When this object appears and how it's used

3 moments

S6E16 · The Invasion Part 6

Doctor reveals Vaughn’s betrayal and Cybermen’s global plan

The depolarizer is identified by Zoe as a wearable device positioned at the back of the neck, capable of jamming the Cybermen’s hypnotic control waves. Its proposal shifts the team’s focus from analysis to urgent action, as the Doctor tasks Zoe and Watkins with constructing it. The depolarizer becomes the team’s primary countermeasure, symbolizing hope amid the global crisis.

Before: Conceptualized but not yet constructed; its feasibility is theoretical until Zoe and Watkins begin building it.

After: Tasked for immediate construction, with Zoe and Watkins assigned to assemble it using available neuristors.

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S6E16 · The Invasion Part 6

Zoe proposes depolarizer countermeasures

Zoe identifies the depolarizer as a wearable device positioned at the back of the neck, capable of jamming the Cybermen's hypnotic control waves. The Doctor tasks Zoe and Professor Watkins with constructing these devices urgently, elevating their mission to a race against time. The depolarizer becomes the linchpin of humanity's survival strategy, offering a proactive countermeasure to the Cybermen's systemic threat.

Before: Conceptualized but not yet constructed; the components (neuristors) are available in the laboratory.

After: Now a critical priority for construction, with Zoe and Watkins tasked with building the devices as quickly as possible.

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S6E16 · The Invasion Part 6

Doctor scrambles for depolarizer components

The depolarizers are the lifeline in this scene—the wearable devices designed to block the Cybermen’s hypnotic control signal. Though only three have been constructed, their existence is a fragile hope against the invasion. The Doctor’s urgency to find more neuristors is directly tied to the need to produce additional depolarizers, as each one represents a potential shield for someone in London. Their role here is both functional (as a countermeasure) and symbolic (a tangible representation of the team’s fight against the Cybermen).

Before: Three depolarizers have been constructed, but the shortage of neuristors prevents the creation of more. They are ready for deployment but insufficient in number to protect the city.

After: The depolarizers remain the same in quantity, but the frantic search for neuristors has begun, raising the possibility (though not the certainty) of constructing additional units if spare parts are found.

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