Fabula
Object
Object

Sabotaged TARDIS Oxygen Supply Cylinder

Part of the Doctor's own TARDIS systems, sabotaged during a Spiridon atmospheric scenario to reveal mechanical deception.
2 appearances

Purpose

To regulate and filter air within the TARDIS’s environmental systems, ensuring safe respiration for crew and visitors.

Significance

Exposes sabotage within the TARDIS itself, challenging the Doctor’s authority and forcing Jo to intervene in an unfolding crisis beyond Spiridon’s dangers.

Appearances in the Narrative

When this object appears and how it's used

2 moments
S10E15 · Planet of the Daleks Part 1
Doctor revives and calls Jo urgently

The sabotaged oxygen supply cylinder hums quietly within the TARDIS, its readiness betraying tampering despite the planet’s breathable atmosphere. The Doctor identifies this anomaly at the console, establishing a direct link between mechanical sabotage and environmental hostility.

Before: Cylinder appears functional but inactive due to breathable external air; no operational anomalies detected.
After: Functional but tampered-with; exposed as a vector for interference, prompting the Doctor to override its controls.
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S10E15 · Planet of the Daleks Part 1
Footprints fungus and failing oxygen

The automatic oxygen supply cylinder remains active despite the breathable atmosphere outside, betraying tampering. The Doctor identifies this anomaly during his console inspection, realizing that the system should have deactivated once the TARDIS landed on Spiridon, pointing to deliberate sabotage within the ship’s infrastructure.

Before: Silent and operational, blending into the TARDIS’s routine environmental controls
After: Revealed as a point of sabotage, its unexpected activation triggering urgent investigation
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