Doctor Who
Character
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Callum

cautious loyal competent skeptical practical
Callum serves as security crewman and technical specialist under Captain Hopper on the Telos expedition to the Cybermen tombs. He enforces safety protocols, rewires control panels, and handles weapons against threats. Loyal to Hopper, he questions risky decisions by leaders like Klieg and Kaftan, balances team urgency with caution, and protects companions amid sabotage and violence. His practical competence aids escapes, while skepticism toward hidden motives marks his role as a restraining voice in the group's descent into betrayal.
13 appearances
Expedition Security and Technical Operations

Callum's Journey

A timeline through the narrative

13 moments
S5E1 · The Tomb of the Cybermen Part 1
Doctor neutralizes tomb defenses

Tragic and fleeting—his death is sudden and unceremonious, a cautionary tale ignored.

The anonymous expedition member is electrocuted while attempting to open the tomb doors, triggered by Kaftan’s monetary reward. His death serves as a grim warning of the tomb’s dangers, but …

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S5E3 · The Tomb of the Cybermen Part 3
Victoria’s ultimatum forces reluctant alliance

Reluctantly cooperative, masking his doubt with compliance to Hopper’s authority while internally questioning the necessity of the action.

Callum wakes Kaftan during the confrontation and initially questions Victoria’s claims, expressing skepticism about leaving the rocket and the validity of her accusations. He reluctantly agrees to assist after Hopper’s …

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S5E3 · The Tomb of the Cybermen Part 3
Victoria’s desperate ultimatum forces cooperation

Skeptical and dismissive, with a underlying current of frustration. He resents being pressured into action, particularly by someone he perceives as emotionally irrational. His compliance is driven more by Hopper’s authority than by genuine concern for the trapped individuals.

Callum is initially skeptical, rolling his eyes and dismissing Victoria’s concerns with a sarcastic remark. His body language is closed-off, and he hesitates to engage, only complying after Hopper’s urging. …

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S5E3 · The Tomb of the Cybermen Part 3
Hopper disarms Kaftan in high-stakes standoff

Nervous but determined, with a sense of urgency as he balances his technical tasks with the threat of violence.

Callum works frantically to rewire the control board, hesitating but ultimately cooperating with Hopper’s orders. He prepares smoke grenades for Hopper and is instructed to watch Kaftan, ready to shoot …

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S5E3 · The Tomb of the Cybermen Part 3
Hopper risks descent into Cybermen tomb

Hostile and determined, with a sense of urgency to uphold Klieg’s orders. Her frustration at being disarmed is palpable, but she remains focused on her mission, even in defeat.

Kaftan threatens Hopper and the group with a gun, attempting to prevent the hatch from being opened. She is disarmed by Hopper after Victoria’s scream distracts her. Kaftan’s actions are …

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S5E3 · The Tomb of the Cybermen Part 3
Klieg’s Failed Rescue and Imprisonment

Coolly professional, adhering to Hopper’s authority while remaining alert to the group’s tensions.

Callum follows Hopper’s orders, opening the hatch and later escorting Klieg and Kaftan to the testing room for imprisonment. His actions are cooperative and efficient, reflecting his role as a …

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S5E4 · The Tomb of the Cybermen Part 4
Klieg’s violent consolidation and the Doctor’s warning

Agonized and disillusioned, his pain both physical and emotional as he realizes the expedition’s moral collapse.

Callum lies on the floor, clutching his wounded shoulder, his face contorted in pain. Blood seeps through his fingers as he gasps for breath, his body trembling from the shock …

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S5E4 · The Tomb of the Cybermen Part 4
Klieg defies the Doctor and summons the Controller

In shock and pain, his silence speaks volumes about the brutality of Klieg’s actions and the fragility of human life in the face of ambition.

Callum lies on the floor clutching his shoulder, blood seeping through his fingers as he struggles to stay conscious. His injury is a direct result of Klieg’s gunshot, and his …

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S5E4 · The Tomb of the Cybermen Part 4
Victoria reveals Cybermen’s second weapon

Anxious but resigned, aware of the danger but powerless to intervene directly in the confrontation.

Callum stands nearby with his arm in a sling, a silent witness to the unfolding tension. His injury serves as a physical reminder of the expedition’s deteriorating safety and Klieg’s …

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S5E4 · The Tomb of the Cybermen Part 4
Klieg’s retreat from Cybermen confrontation

Absent but implied to be wary and exhausted—his injury reflects the group’s unraveling.

Callum is not physically present in this exchange, but his absence is felt through Victoria’s action of tending to his injured arm. His sling serves as a silent reminder of …

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S5E4 · The Tomb of the Cybermen Part 4
Cybermen seize control and betray Klieg

Physically and emotionally overwhelmed, his pain and helplessness contrasting with his earlier cautious skepticism, now reduced to a wounded spectator in the unfolding chaos.

Callum, injured and unable to move his arm, lies on the ground as Victoria tends to him. He questions Klieg and Kaftan's motives earlier in the scene, revealing his skepticism …

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S5E4 · The Tomb of the Cybermen Part 4
Toberman’s Breaking Point and the Controller’s Fall

Confused, injured, and overwhelmed by the escalating violence around him, his focus narrowed to his physical pain and the chaos unfolding.

Callum is struck by Toberman and lies injured on the floor, clutching his arm in pain. He questions Klieg and Kaftan’s motives earlier in the scene but is now sidelined …

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S5E4 · The Tomb of the Cybermen Part 4
Klieg’s Betrayal and the Doctor’s Descent

Painful and disoriented, his injury making him a liability in the group’s desperate struggle against the Cybermen.

Callum, injured and unable to move his arm, distracts the group while Klieg betrays them. His pain and vulnerability create a moment of distraction that Klieg exploits to seize the …

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Affiliation

Professor Parry's Archaeological Expedition to Telos
Archaeological Excavation of Cybermen Sites on Telos