Fabula
Object
Object

Thal Corridor Ventilation Grill (Metal Slat Type)

Engineered metal ventilation fixture embedded in the corridor wall, designed for air exchange but repurposed as an eavesdropping point when characters press against its bars.
2 appearances

Purpose

Allow controlled airflow between rooms while enabling restricted visual and audio surveillance through its metal bars

Significance

The grill serves as a critical point of infiltration for the Doctor and Harry to observe Davros’s genocidal plans, making it pivotal to the episode’s central tension about the balance of power between Kaleds and Thals. The moment crystallizes their reliance on environmental vulnerabilities to gather intelligence the Thals intended to keep secret.

Appearances in the Narrative

When this object appears and how it's used

2 moments
S12E13 · Genesis of the Daleks Part 3
Doctor and Harry infiltrate Thal corridors to spy

The ventilation grill embedded in the angular Thal corridor wall allows the Doctor and Harry to eavesdrop on Davros's conversation with Thal councillors. Its rectangular opening and narrow slats force them to press their faces close, straining to catch every word despite the grill's slight bending under their weight. The grill's compromised integrity after their use marks the spot of their covert intelligence gathering.

Before: Intact and functioning as part of the corridor's ventilation system, concealing airflow noise but permitting strained listening.
After: Bearing faint scratches and slight deformation from the Doctor's and Harry's weight, evidence of their covert use.
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S12E13 · Genesis of the Daleks Part 3
Davros reveals his conquest plan

The rectangular ventilation grill embedded at the base of the corridor door becomes a dual-purpose listening device for the clandestine pair. After peering through the porthole, they strain to hear Davros’s words by pressing their ears and faces against the grill’s bars, bending the metal slightly under their combined weight and heightening the risk of aural detection.

Before: Firmly secured to the door with evenly spaced ventilation slats, showing no signs of tampering but offering minimal sound leakage due to its intended secrecy.
After: Slightly warped at the edges from pressure and scratches from Harry and the Doctor’s movements, visible evidence of trained operatives exploiting structural weaknesses to surveil an enemy meeting.
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