Fabula
Object
Object

Kellman’s Electrified Ventilation Power Supply

Hidden electrical source rigged to energize the ventilation system, causing lethal current to flow through ducts
2 appearances

Purpose

To serve as a lethal defensive mechanism by electrifying the ventilation air flow, ensuring intruders are incapacitated via electrocution when entering the cabin.

Significance

This power supply acts as a pivotal moment in the escalation of danger on the Nerva Beacon, demonstrating Kellman’s full alignment with the Cybermen and his willingness to murder to protect their infiltration. Its existence turns a mundane ship system into a deadly instrument, signaling the collapse of trust and the onset of overt aggression.

Appearances in the Narrative

When this object appears and how it's used

2 moments
S12E17 · Revenge of the Cybermen Part 1
Doctor uncovers and escapes Kellman’s trap

The power supply feeds the electrified ventilation system through concealed wiring, enabling the lethal trap. Its manipulation by Kellman transforms the cabin’s seams into a deadly environment, forcing the Doctor to navigate its currents.

Before: Operating normally as part of the cabin’s auxiliary systems
After: Repurposed into a weapon, channeling current through the wired grille into live smoke
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S12E17 · Revenge of the Cybermen Part 1
Doctor triggers electrified smoke trap

The concealed electrical source rigged by Kellman energizes the ventilation system, creating a lethal maze of electrified smoke that traps and incapacitates intruders. Its activation by the trap mechanism shocks the Doctor, underscoring the cabin’s deadly transformation.

Before: Integrated into the cabin’s power system, dormant
After: Activated, delivering a life-threatening electric shock via smoke
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