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Gravis

coldly pragmatic ruthlessly ambitious alienated by isolation verbally dominant mechanically focused
Gravis is the ruthless first among the Tractators, a species that assimilates organic minds to animate their excavation technology. His voice carries calm authority, masking a fundamental ruthlessness beneath measured detachment. He approaches conquest with alien logic, framing planetary domination as cooperation and replacement of 'useful parts' as necessary maintenance. Though physically bound to Frontios, his obsession with mobility drives every interaction with the Doctor and Tegan, revealing an underlying desperation beneath his cold confidence.
15 appearances
Tractator Assimilation Technology

Gravis's Journey

A timeline through the narrative

15 moments
S21E9 · Frontios Part 3
Gravis reveals Tractators' plan to Plantagenet

Detached confidence bordering on arrogant certainty, masking no visible warmth or empathy for his prisoner's plight

The Gravis stands as Plantagenet's interrogator, methodically explaining the Tractators' expansionist excavation plans while maintaining cold, precise control over the conversation. His demands for understanding and repeated threats of coercion …

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S21E10 · Frontios Part 4
Doctor confronts the Gravis in lair

Coldly detached with subtle confidence rooted in perceived superiority

The Gravis’s voice cuts through the cavern with cold precision, his first words categorizing the newcomers as specimens before extending a calculated welcome. His measured responses and implicit threats frame …

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S21E10 · Frontios Part 4
Gravis details tyrannical plan in Operations Centre

Coldly confident masking ugly desperation

The Gravis commands the Operations Centre with calm authority, using measured detachment to reveal the facility as a hub for planetary domination via the gravity motor. His obsession with mobility …

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S21E10 · Frontios Part 4
Tegan confronts the Doctor on morality

Cold confidence undercut by quiet desperation to assert dominion over the Doctor and the colonists.

Leans into the Operations Centre’s threat environment with measured calm, posing questions about the Doctor’s mobility and insinuating Gallifrey’s awareness of Frontios while omitting the Tractators’ role. His calm authority …

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S21E10 · Frontios Part 4
Doctor outmaneuvers Gravis as Tegan vanishes

Provocative confidence, masking underlying urgency to assert dominance before the Doctor regains initiative

Maintaining calm composure despite the Doctor’s deflection, Gravis leverages the moment to showcase Tractator superiority through the unveiling of a humanoid replica, framing it as proof of their dominion.

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S21E10 · Frontios Part 4
Gravis exposes Tractator's mechanical necessity

Cold satisfaction veiling existential desperation

The Gravis addresses the Doctor with detached authority, standing amid the humming machinery of the lair. His calm delivery belies a chilling pragmatism as he dismisses Revere’s death as an …

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S21E10 · Frontios Part 4
Turlough reveals Tractator truth to allies

Implied confidence masking growing desperation as intelligence is weaponized against him

Though not present on screen, the Gravis is implicated as the unseen architect of Turlough’s servitude and Plantagenet’s forced knowledge. His presence is felt through Turlough’s revelations and the immediate …

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S21E10 · Frontios Part 4
Gravis swears vengeance on the Doctor

Enraged fury masking deep humiliation and desperation beneath cold detachment.

The Gravis is physically standing among the wreckage of the gravity motor, his voice trembling with fury as he addresses the Doctor. His measured detachment has evaporated, replaced by uncontrolled …

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S21E10 · Frontios Part 4
Doctor abandons delay and orders Tegan to act

Emotionally detached, embodying alien logic that frames terror as utility

Though physically absent from the cave, the Gravis’ influence permeates the moment through the gravity beam’s sudden violence. His unseen presence drives the crisis: the beam is the Tractators’ instrument, …

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S21E10 · Frontios Part 4
Tegan flees Gravis into TARDIS shard

Cool detachment masking an underlying possessive urgency to claim the TARDIS shards and their latent power.

The Gravis approaches Tegan with calm authority after noticing her recognition of the TARDIS fragments, his measured words concealing a ruthless calculation to exploit her as a driver for his …

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S21E10 · Frontios Part 4
Doctor negotiates truce while trapping Gravis

Triumphant and distracted, consumed by the allure of infinite travel

The Gravis strides into the TARDIS with triumphant certainty, mistaking the Doctor’s offerings for genuine surrender. He lingers over the console, enchanted by its theoretical capabilities, and allows himself to …

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S21E10 · Frontios Part 4
Gravis distracted by TARDIS obsession

Triumpant greed curdling into absorbing fixation as control systems activate

The Gravis enters the TARDIS impulsively, fixated on claiming the vessel’s power. His early triumphant declaration curdles into mesmerized absorption as he activates controls, gratified by the prospect of infinite …

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S21E10 · Frontios Part 4
Doctor leaves Frontios with final warning

Professionally resolute with a surface veneer of mild detachment masking unspoken urgency

The Doctor finalizes the Gravis’s imprisonment on Kolkokron, then returns to present a salvaged hat stand to Plantagenet as a farewell token. He declines further stays with brisk efficiency, emphasizing …

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S21E10 · Frontios Part 4
Doctor scolds companions for Time Lord rules

N/A (absent but implied dominion)

Though physically absent, the Gravis is the unseen driving force behind the gravitational pull dragging the TARDIS toward the galactic core. His unnamed presence looms large as the crew recognizes …

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S21E10 · Frontios Part 4
TARDIS plunges toward galactic center

Coldly satisfied, manifesting his control through the irresistible pull of his gravity motor.

Though physically absent from the scene, the Gravis’s presence looms as an unseen but undeniable force. The Doctor deduces their involvement in the gravitational pull, framing the event as a …

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Affiliation

Tractators
Subterranean Organic-Power Assimilation and Planetary Mechanics