Ventilation Duct

A narrow metal conduit running through the basement ceiling, the ventilation duct provides the sole path for air exchange between the basement and Solon's laboratory upstairs. Rough-cut and partially corroded, its grille shows signs of disrepair, but it serves as the critical route through which the Doctors brew cyanogen gas is funneled upward. Sarah spots it during their frantic search for a way to disrupt the resurrection experiments.

1 appearances

Purpose

To direct airflow from the basement to the upper laboratory, enabling gas dispersal.

Significance

The duct transforms from an obscure infrastructure element into the instrument of salvation for the Doctors' desperate plan, forcing temporal urgency as they gamble their survival on its functionality.

Appearances in the Narrative

When this object appears and how it's used

1 moments

S13E20 · The Brain of Morbius Part 4

Doctor and Sarah deploy gas attack

The ventilation duct serves as the only conduit between basement and lab. It carries the newly created cyanogen gas upward toward the resurrection chamber. Its corroded grille and rough-cut metal frame accommodate the bowl’s placement, enabling the toxic cloud to drift directly into Solon’s workspace.

Before: Concealed behind a kicked-over side table, corroded and partially clogged with dust — revealed by Sarah’s inspection under the Doctor’s guidance.

After: Clogged and fouled by chemical residue from the gas, its function temporarily reversed from ventilation to chemical delivery system — now part of the sabotage.

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