Fabula
Object
Object

Unnatural Footprints on Spiridon

Pale, ghostly impressions mar the damp jungle soil of Spiridon and alien antimatter terrains, their edges too sharp for natural steps. Jo follows them with growing unease as the tracks twist unnaturally between hostile vegetation, leading toward derelict spacecraft or engineered surfaces. The prints lack any mud or moisture—only disturbed dust clinging to their edges—suggesting they’re not from living feet but something far older. When Jo brushes carnivorous plants on Spiridon or antimatter entities step across rock surfaces, the footprints react subtly: vegetation recoils from their maker on Spiridon, while calcified trails remain untouched in antimatter zones. The Doctor notes their unnatural precision in both locations just before oxygen levels or environmental systems spike unprompted, linking the prints directly to sabotage threatening their survival.
4 appearances

Purpose

To serve as a navigational trail left by an unseen presence on Spiridon, possibly guiding—or luring—visitors toward specific locations like the derelict spacecraft.

Significance

These footprints become the first concrete evidence of a third party on Spiridon, tying together the sabotage of the TARDIS oxygen system and the mummified Thal corpse in the ship. They represent the intersection of biological peril (arum plants) and mechanical sabotage, forcing Jo to confront the planet’s dual threats while the Doctor uncovers the systematic interference.

Appearances in the Narrative

When this object appears and how it's used

4 moments
S10E2 · The Three Doctors Part 2
Doctor and Jo trace antimatter intruders

Chalk boot prints appear unnaturally crisp across the alien ground, their bright white streaks defying natural erosion and guiding the travelers forward. Recognized as clues, they become the path into Omega’s antimatter environment, drawing Jo and the Doctor deeper into the deception.

Before: Nonexistent; originate from Omega’s intrusion
After: Fresh and guiding, leading toward Omega’s domain
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S10E15 · Planet of the Daleks Part 1
Doctor revives and calls Jo urgently

Pale, irregular footprints disrupt the soil, their edges too sharp and deliberate to be natural. As Jo brushes arum plants, the prints respond subtly, as if the vegetation recoils from their maker. The Doctor later notices their correlation with the sabotaged oxygen system, linking organic tracks to mechanical deception.

Before: Freshly pressed into damp Spiridon soil; unnoticed by anyone until Jo investigates.
After: Footprints remain on the soil surface; their unnatural nature noted by Jo and later connected to the TARDIS sabotage by the Doctor.
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S10E15 · Planet of the Daleks Part 1
Footprints fungus and failing oxygen

The unnatural footprints are discovered by Jo in Spiridon’s soil outside the TARDIS, observed as pale, deliberate imprints that do not conform to natural steps or Thal physiology. These tracks lead her onward and become intricately linked to the sabotage when the Doctor correlates their presence with the mechanical malfunction in the oxygen system.

Before: Undisturbed soil surface showing no obvious signs of disturbance
After: Clear but eerie footprints exposed and examined, their unnatural precision becoming a focal point of investigation
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S10E15 · Planet of the Daleks Part 1
Jo discovers mummified corpse in ship

The unnatural footprints guide Jo relentlessly toward the derelict spacecraft, their sharp, ghostly edges standing out against the jungle floor and plant life. Inside the ship, their subtle influence is still felt as Jo’s movement and presence cause nearby arum plants to react with recoil. The footprints act as a trail, binding the ship’s fate to the unseen presence that left them.

Before: Clearly visible on the jungle floor, leading unerringly toward the spacecraft
After: Unchanged as physical evidence, now tied to the discovery inside the ship
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