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Drill-Head Rigger
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Harry Slocum

direct pragmatic dismissive of superstition brisk composed practical confident coordinating reassuring
Harry Slocum works as a drill-head rigger and maintenance specialist at the Isle of Grain site for the East Anglia Deep Drilling Project. Mustachioed in white overalls, he pedals his bike underground with toolbox ready, bantering with Bromley while fixing pipes and handling demands from Gold and Stahlman. Colleagues rely on his brisk confidence and working-class directness to keep drilling on track amid glitches. Exposure to the green ooze sparks his violent regression into a primitive killer.
26 appearances
Drilling Site Maintenance
Also known as: Slocum, Harry

Harry Slocum's Journey

A timeline through the narrative

26 moments
Season 7 (20) Season 8 (6)
S7E19 · Inferno Part 1
Doctor’s Arrival and Workers’ Warning

Uneasy but masking it with casual banter—his metaphor about the drilling noise suggests he senses something is wrong, though he doesn’t yet articulate it directly.

Slocum, a mustachioed maintenance worker in white overalls, pedals his bike toward Bromley while whistling, carrying a toolbox. His casual greeting (‘Hello, John. How's it going on in there?’) belies …

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S7E19 · Inferno Part 1
Gold discovers hidden system failure

Feigned nonchalance masking professional detachment; Slocum’s emotional state is one of practiced indifference, a coping mechanism for the relentless pace of the drilling project. His dismissal of the pipe’s failure isn’t just professional habit—it’s a defense against the creeping anxiety of systemic instability.

Harry Slocum, clad in his white maintenance overalls, responds to Sir Keith Gold’s summons with the easy confidence of a seasoned technician. He initiates the interaction by addressing Gold directly, …

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S7E19 · Inferno Part 1
Slocum dismisses drill instability

Feigned nonchalance masking unconscious complacency; his confidence is a shield against acknowledging the drill’s instability.

Harry Slocum, a mustachioed maintenance specialist in white overalls, stands in the noisy Drill Head, examining the malfunctioning pipe with practiced ease. He taps the pipe casually, his body language …

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S7E19 · Inferno Part 1
Stahlman ignores Slocum’s transformation

Detached and deteriorating, with a growing feral undercurrent masked by compliance

Slocum reappears in Central Control in a visibly deteriorated state, his skin blistering from green ooze exposure and his demeanor unnaturally subdued. He silently obeys Stahlman’s order to accelerate drilling …

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S7E19 · Inferno Part 1
Stahlman crushes Gold’s authority over drilling

Initially, Slocum is focused and methodical, but after exposure to the ooze, his emotional state shifts to one of disorientation and mounting aggression. His pain is physical, but his later actions suggest a loss of control, hinting at the ooze’s corrupting influence.

Slocum is off-screen during the Central Control confrontation but is actively involved in the drill head maintenance. He loosens bolts with a wrench, accidentally exposing himself to the green ooze, …

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S7E19 · Inferno Part 1
Brigadier Confronts Doctor Over Murder

Controlled suspicion bordering on frustration. The Brigadier is a man used to being in charge, but the Doctor’s presence and the unnatural elements of the case are testing his patience and trust. He is determined to get answers and maintain control of the situation.

The Brigadier enters the office already in command mode, overseeing the search for Slocum and the murder investigation. He engages in brief, professional banter with the Doctor but quickly shifts …

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S7E19 · Inferno Part 1
Brigadier Probes Doctor’s Hidden Motives

Professionally focused, with an undercurrent of unease. The murder and the Doctor’s evasiveness are unusual enough to unsettle even his disciplined demeanor, but he channels it into action—following orders without question.

Sergeant Benton is the quiet, efficient presence in the room, handling the practicalities of the investigation with military precision. He hangs a group photograph on the wall—a small act of …

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S7E19 · Inferno Part 1
Doctor bypasses workshop security

Lighthearted but attentive. His banter with the Doctor serves as a brief respite from the gravity of the situation, though his underlying professionalism remains evident.

Latimer stands guard outside the Doctor’s workshop, his posture relaxed but attentive. He greets the Doctor with a polite 'Morning, sir,' and updates him on the search for Slocum, revealing …

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S7E19 · Inferno Part 1
Slocum infiltrates reactor switch room

Primal and instinct-driven, with a simmering aggression barely contained. His human traits are subsumed by the ooze’s influence, leaving only a feral awareness of his surroundings and the potential for violence.

Slocum enters the Nuclear Reactor Switch Room unnoticed, his body now a grotesque fusion of human and monstrous traits—green, hairy-skinned, and feral. He moves with predatory stealth, his transformed physique …

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S7E19 · Inferno Part 1
TARDIS console overload and Doctor's limbo

Agonized and disoriented, likely acting out of desperation to stabilize the drill head or alleviate his pain. His actions are reactive rather than calculated, reflecting the broader chaos unfolding in the facility.

Harry Slocum is only indirectly referenced in this event, with the Doctor noting his 'green Slocum' with blood on his overalls, pulling a lever to the red section. This action …

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S7E19 · Inferno Part 1
Doctor risks limbo to resume trials

Not directly observable, but implied to be one of pain and transformation—his condition reflects the broader chaos and impending disaster.

Harry Slocum is mentioned indirectly by the Doctor as a reference point ('the green Slocum has blood on his overall'), implying his monstrous transformation and the escalating dangers of the …

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S7E20 · Inferno Part 2
Doctor restrains Benton from Slocum

Unstable and volatile (implied by his retrogressive state and the reactions of others). His emotional state is not directly observable but is inferred to be chaotic and dangerous.

Harry Slocum is not physically present in this specific moment of the event, but his violent and retrogressive state is the catalyst for the Doctor’s intervention and Benton’s reaction. His …

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S7E20 · Inferno Part 2
Doctor Calms Slocum Before Confrontation

Terrified and disoriented; his panic is not just fear of the situation but fear of himself, of what he is becoming. The Doctor’s voice is a lifeline, but it’s drowning in the static of his transforming body.

Slocum is a man unraveling. His body language is jerky, his movements erratic—as if his muscles are no longer fully under his control. His hands, now green-tinged and hairy, clutch …

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S7E20 · Inferno Part 2
Stahlman refuses emergency declaration

Erratic violence (during attack), then exhausted collapse (post-mortem). His state reflects the project’s corruption.

Slocum’s violent transformation and fatal attack on Wyatt are recounted in Stahlman’s internal monologue, framing him as a monstrous byproduct of the project’s hubris. His retrogressive state—green-skinned, supernaturally strong—embodies the …

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S7E20 · Inferno Part 2
Doctor stabilizes reactor with improvised tool

None (incapacitated, but his condition evokes fear and urgency in others).

Slocum lies slumped by the wall, still conscious but incapacitated after his violent retrogressive attack. His physical state is a direct result of the green liquid’s contamination, and his presence …

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S7E20 · Inferno Part 2
Doctor examines Slocum’s unnatural death

N/A (corpse, but his condition evokes horror and urgency in the living).

Slocum’s corpse lies motionless on the floor of the reactor switch room, his body still radiating residual heat from the retrogressive transformation. His chest bears the entry wounds of two …

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S7E20 · Inferno Part 2
Wyatt’s violent regression and death

'Feral and uncontrollable,' driven by the retrogressive infection that has stripped away his humanity. His emotional state is one of 'Animalistic rage and confusion.'

Wyatt is spotted by the Doctor on a distant catwalk, now green-faced and feral, clutching his rifle. He runs from the Doctor, swinging his rifle wildly before losing his balance …

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S7E20 · Inferno Part 2
Brigadier confronts Doctor over Krakatoa link

Lost to the infection, Wyatt is no longer in control of his actions—his emotional state is one of violent, instinctual rage, devoid of reason or recognition.

Wyatt, now infected and feral, appears on a distant catwalk, clutching his rifle. His movements are erratic and violent, swinging the rifle wildly as the Doctor pursues him. His loss …

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S7E21 · Inferno Part 3
Doctor faces execution order in dystopian camp

N/A (Absent but invoked as a threat—his rampage is treated as a fact that condemns the Doctor further.)

Harry Slocum is not physically present in the scene but is invoked by the Doctor as a figure who 'went berserk and started killing people.' His mention serves as evidence …

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S7E21 · Inferno Part 3
Stewart orders Doctor’s execution

Not applicable (off-screen), but his absence is charged with implication. The Doctor’s description paints him as a wild, uncontrollable force, while Stewart’s reaction frames him as a threat to the regime’s order. The emotional weight of his mention lies in what he represents: the unraveling of the regime’s control and the catastrophic consequences of the drilling project.

Harry Slocum is not physically present in the scene but is invoked as a critical piece of evidence by the Doctor to prove his knowledge of this world. The Doctor …

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Affiliations

Inferno Project Team
member
Deep-Earth Drilling Operations and On-Site Crisis Response

Slocum works as a maintenance specialist for the Inferno Project Team, directly involved in the drilling operations, reporting to the project's supervisors.

Isle of Grain Research Complex
employee
Deep Drilling Research, Nuclear Power Operations, and Safety Protocol Enforcement

Harry Slocum is a drill-head rigger and maintenance specialist at the Isle of Grain Research Complex, a crucial role within the facility's operations.

Television News Crew (Devil’s Hump Dig)
employee
Live Broadcast Journalism and Public Event Coverage

Harry Slocum directs on-site television production, cues reporter Alastair Fergus, coordinates timings, and relays studio instructions. This firmly places him as an employee of the Television News Crew covering the Devil's Hump dig.

Across the Seasons

How this character reads at season scale

Season 7 · planet

Harry Slocum works as a drill-head rigger and maintenance specialist at the Isle of Grain site for the East Anglia Deep Drilling Project. Mustachioed in white overalls, he pedals his bike underground with toolbox ready, bantering with Bromley while fixing pipes and handling demands from Gold and Stahlman. Colleagues rely on his brisk confidence and working-class directness to keep drilling on track amid glitches. Exposure to the green ooze sparks his violent regression into a primitive killer.