Fabula
Object
Object

Cave Ventilation Duct Emergency Barrier

Critical emergency exit barrier located at the terminal end of a cave ventilation duct system
2 appearances

Purpose

To filter incoming air and restrict passage of large debris or creatures while maintaining airflow through the underground facility

Significance

This crumbling barrier becomes the trio's only viable escape route during the Kaled-Dalek purge, its sudden collapse underscoring their precarious position. The Doctor's willingness to destroy it reveals his prioritization of survival over preservation, while its fragile state demonstrates how time and conflict have eroded Skaro's infrastructure

Appearances in the Narrative

When this object appears and how it's used

2 moments
S12E12 · Genesis of the Daleks Part 2
Entrance to the heart of Kaled terror

The corroded metal mesh barrier at the duct’s exit is the final obstacle separating the Doctor and Harry from the cavern. As the armored creature moves past it, the fragility of the mesh becomes apparent. The Doctor and Harry then use their combined strength to push the creature back through the frame, thereby clearing the way to enter the cavern despite the barrier’s compromised condition.

Before: Corroded and partially detached, barely containing the cavern’s atmosphere, with dust and fragments clinging to its frayed edges.
After: Severely bent and dislodged from its frame after being forced aside by the Doctor and Harry, no longer serving as a barrier.
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S12E14 · Genesis of the Daleks Part 4
Dangerous progress through clam-infested caves

The steel ventilation duct serves as the only viable escape route for the group, prompting Harry to climb through it first. The Doctor pries open a corroded mesh barrier to widen the passage, allowing Harry to squeeze through. The duct's claustrophobic nature heightens the danger of the escape.

Before: corroded and partially blocked by a frayed metal mesh barrier
After: permanently bent and widened to allow passage through
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