Fabula
Object
Object

Concealed Shock Rock Trigger

A fist-sized chunk of pitted limestone, its grey surface scored by ancient tectonic striations and dusted with Exxilon excavation grime. The rock’s angular edges bear faint tool marks from prior attempts to secure it—barely perceptible except in the crevice’s dim light. Sarah and the Exxilons lever it into position as cover within the tunnel, its pivoting motion planned to dislodge destabilized terrain above. When struck by the Doctor’s aim, it unleashes a cascading fall of smaller stones, the noise masking their presence until the ambush breaks.
4 appearances

Purpose

Serve as a noise-masking trap trigger that dislodges destabilized terrain, concealing movement by creating an artificial cascade of rocks to disrupt ambient silence.

Significance

Critical to the survival of Sarah and the Exxilons during the ambush. Its failed trigger exposes their position to the Daleks, forcing them into a desperate choice to remain hidden at all costs.

Appearances in the Narrative

When this object appears and how it's used

4 moments
S11E11 · Death to the Daleks Part 1
Sarah Jane discovers Exxilon beacon

The Concealed Shock Rock Trigger, a chunk of limestone balanced precariously atop the crevasse, tumbled down when dislodged by the Doctor’s mercy throw. The rockfall masked the disturbance’s sound with a cascade of stones, attracting the MSC soldier’s attention and enabling the ambush.

Before: Firmly balanced and undisturbed, the rock waited silently to mask intruders
After: Knocked loose by the Doctor’s aim, the rock triggered the ambush by alerting the MSC soldier via sound
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S11E13 · Death to the Daleks Part 3
Doctor tricks snake into killing Dalek

The Doctor improvises by using the chaos of the snake-and-Dalek firefight to recover a fallen Dalek weapon array and brandishes it briefly to reinforce Sarah’s reassurance.

Before: Lying inert on the tunnel floor after the Dalek’s weapon discharge nearby
After: Retrieved by the Doctor, brandished briefly then tucked away as he flees
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S11E13 · Death to the Daleks Part 3
Sarah risks alliance for the Doctor

The concealed crevice in the rock wall provides temporary refuge for Sarah and the Exxilons as they evade Dalek detection. Its narrow opening forces them to move swiftly and silently to avoid exposure.

Before: Narrow, jagged crevice offering minimal concealment.
After: Remains a critical hiding spot until forced to move by the approaching Dalek.
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S11E13 · Death to the Daleks Part 3
Exxilons and Sarah hide from Daleks in tunnel

The Concealed Shock Rock Trigger is repositioned by Sarah and Bellal into unstable terrain above the crevice. When struck by the Doctor’s deliberate action, it triggers a landslide of stones, masking the group’s escape with noise until they vanish into the rock. Its strategic placement turns passive stone into an active distraction.

Before: Fist-sized chunk of limestone lying in the tunnel
After: Dislodged and used to create a rockfall, then discarded
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