Fabula
Object
Object

Kroton Polarised Centrifuge

A Kroton biological life-support system processing tellurium, distinct from the Kroton power-absorption machine. Its malfunction in The Krotons Part 3 reveals the Krotons' chemical vulnerability, enabling sulphuric acid sabotage as a narrative pivot.
2 appearances

Purpose

Sustains Kroton life-support processes through tellurium-dependent polarization

Significance

Accidental activation exposes Krotons' tellurium reliance, pivoting Doctor's strategy to chemical sabotage and heightening Zoe's paranoia over surveillance

Appearances in the Narrative

When this object appears and how it's used

2 moments
S6E21 · The Krotons Part 3
Doctor exploits Krotons' tellurium weakness

The Krotons' polarised centrifuge is recalled by Zoe as a clue that triggers the Doctor's deduction about their tellurium-based life system. Though not physically present in this scene, its activation earlier by the companions serves as the catalyst for the Doctor's strategic pivot. The centrifuge's role as a life-support system dependent on tellurium is the key insight that allows the Doctor to propose hydrogen telluride as a weapon. This object, though absent, looms large in the conversation, symbolizing the Krotons' vulnerability and the companions' unintended role in uncovering it.

Before: Previously activated by the Doctor and Zoe, now dormant but critical to the Krotons' survival. Its tellurium composition is the linchpin of the Doctor's plan, though this is not yet known to the Krotons.
After: Unchanged physically, but its significance is now fully realized by the Doctor. The centrifuge remains a target for sabotage, with hydrogen telluride poised to corrode its tellurium-based structure. Its role as a weakness in the Krotons' defenses is now explicit.
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S6E21 · The Krotons Part 3
Zoe’s Paranoia and the Doctor’s Blind Spot

The polarised centrifuge is referenced by the Doctor as a key artifact related to the Krotons' life-support system. Its accidental activation by the team earlier in the story is a critical piece of information, as it reveals the Krotons' tellurium-based physiology and potential weakness. The centrifuge serves as a narrative and scientific link between the team's past actions and their current plans to synthesize hydrogen telluride. Its mention in this scene underscores the Doctor's strategic thinking and the team's growing understanding of the Krotons' vulnerabilities.

Before: The polarised centrifuge is located within the Krotons' ship or facility, where it was accidentally activated by the Doctor and Zoe. It is fully operational and integral to the Krotons' life-support system.
After: The polarised centrifuge remains operational but is now a target for the Doctor's hydrogen telluride plan. Its status as a potential weakness in the Krotons' defenses makes it a focal point for the team's counterattack strategy.
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