Hexachromite Storage Tanks Array

Debating hexachromite gas and extinction

The presence of hexachromite gas, observed in corroded canisters and acknowledged by the Doctor, underpins the entire conversation. Its lethal properties and military application frame the immediate danger and foreshadow the base’s hidden toxicity and its connection to the broader ecological and geopolitical collapse.

Before: Stored in corroded, neglected containers within a sealed chemical store, its lethal properties overlooked or ignored due to military necessity and secrecy

After: Officially remains undisturbed in corroded canisters, but its lethal nature is now a known threat to the companions and the mission

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S21E4 · Warriors of the Deep Part 4

Doctor races to find peaceful solution

A hexachromite tank is punctured by a rogue energy bolt from the Doctor's weapon, releasing lethal gas into the confined space. The gas rapidly kills the attacking Sea Devil by dissolving its internal organs, which leak out as green fluid from its eyes and nose, vividly demonstrating its toxicity to reptilian life.

Before: Rust-streaked steel cylinder containing colorless hexachromite gas, resting unnoticed among other chemical containers.

After: Punctured canister leaking toxic green fluid, its contents released into the atmosphere, rendering the space hazardous.

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S21E4 · Warriors of the Deep Part 4

Hexachromite gas slaughters Sea Devil but horrifies Doctor

One of the rusted steel hexachromite tanks is punctured by the Doctor's accidently discharged energy bolt, releasing the colorless but acrid gas. The gas immediately kills the ambushing Sea Devil by dissolving its reptilian organs into green fluid, which leaks from its eyes and nose. Preston immediately recognizes its military potential, transforming a toxic hazard into a weapon proposal.

Before: Standing upright on the shelf among other corroded tanks, containing hexachromite gas under pressure, unnoticed as the Doctor searches for alternatives.

After: Punctured and leaking gas, its contents now spilled within the confined space and active as a lethal agent, turning the store into a potential battleground.

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S21E4 · Warriors of the Deep Part 4

Doctor and Preston clash over hexachromite weapon

The hexachromite tank’s sudden breach releases gas that dissolves the attacking Sea Devil, demonstrating its lethal potential. Preston immediately proposes weaponizing the remaining tanks against the Silurians, turning the Doctor’s search for alternatives into a moral crucible as the gas’s devastating effects become a tactical possibility.

Before: Stored on corroded racks in the chemical store, untouched and inert, part of a forgotten chemical stockpile in the rapidly militarized base.

After: Spilled contents create a deadly atmosphere in the sealed chemical store, with one tank punctured and leaking green fluid from the dissolved Sea Devil’s remains.

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S21E4 · Warriors of the Deep Part 4

Doctor plans non-lethal missile abort

The hexachromite tanks line the shelves in the chemical store, their corrosion and leakage a lurking hazard. One tank is accidentally punctured by the Doctor's energy bolt, releasing the gas into the confined space which immediately dissolves the Sea Devil's inner organs while the rest watch in horror.

Before: Rust-streaked, leaking faintly with corroded valves hissing in the humid air, stored among other chemicals in the chemical store.

After: One tank is breached and emptying its lethal contents; another tank has been toppled but remains intact. The gas fills the air, leaving its acrid stench and demonstrating its horrifying lethality.

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S21E4 · Warriors of the Deep Part 4

Doctor syncs mind to stop missile launch

Hexachromite canisters are purposefully connected by Bulic to purge Silurians from the bridge, spreading acrid toxic vapour that incapacitates the reptilian soldiers and even risks allies. The gas pours visibly into the bridge environment as part of Bulic’s purge operation.

Before: Stored, connected to control; rust-streaked cylinders sealed until activation.

After: Emptying into the bridge atmosphere, causing immediate collapse of Silurians and forcing Tegan to tend to victims.

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S21E4 · Warriors of the Deep Part 4

Vorshak defies Ichtar faces death saving Doctor

Hexachromite gas is deliberately released via connected canisters as a weapon, filling the bridge and rendering Silurians defenseless. The gas forces a crisis interruption, disrupting Silurian operations and contributing to their collapse.

Before: Stored in corroded tanks along the bulkhead.

After: Released into the air, causing visible and lethal effects among the Silurians.

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S21E4 · Warriors of the Deep Part 4

Doctor risks sanity to stop missile launch

Hexachromite gas erupts into the bridge from activated canisters, filling the chamber and killing Silurians and Sea Devils alike. Bulic’s deployment and the gas’s release coincide with the Doctor’s synchronization attempt, creating a lethal atmosphere that forces Ichtar’s compliance through biological threat rather than persuasion.

Before: Stored in corroded tanks until Bulic connects piping to release the gas into the bridge’s airflow system.

After: Still diffusing through the bridge atmosphere post-abort, causing mass casualties among Silurians and Sea Devils and lingering as toxic residue in the confined space.

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S21E4 · Warriors of the Deep Part 4

Doctor halts missiles as leader falls

Hexachromite tanks, connected by Bulic at Ichtar’s command, hiss as toxic vapor floods the back of the bridge. The gas incapacitates the Silurians and Sea Devils, but also creates a lethal atmosphere that nearly claims the Doctor despite Vorshak’s attempts to contain the immediate gassing.

Before: Sealed rust-streaked cylinders with intact valves, hidden in a chemical storage area.

After: Contents partially vented, the tanks depleted or sealed shut mid-crisis.

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Appearances in the Narrative