Doctor Who
Object

Arbitan's Knife

Susan spots the knife protruding from the dead Voord's back right after he grabs her in attack. She recounts the detail to the Doctor and Barbara in the corridor, sparking their theory of an unseen pyramid guardian. Ian later sees Arbitan wield a blade against another Voord assassin, linking the weapons as tools of defense in the building's shadowed halls.
2 appearances

Purpose

Kill Voord attackers threatening pyramid inhabitants

Significance

Exposes Arbitan as isolated protector, frames Voord as infiltrators rather than natives, binds TARDIS crew to his quest via demonstrated peril and intervention

Appearances in the Narrative

When this object appears and how it's used

2 moments
S1E21 · The Sea of Death
Susan’s attack and Barbara’s fear of capture

Arbitan’s knife is the silent instrument of salvation, plunging into the Voord’s back to save Susan and later used by Ian to defend Arbitan. Its presence underscores the pyramid’s violent undercurrent and Arbitan’s lethal efficiency as a lone guardian. The knife’s sudden appearance and disappearance mirror the robed figure’s elusive role, tying the object to the building’s hidden defenses and the Voord’s vulnerability to direct confrontation.

Before: Sheathed or concealed on Arbitan’s person, unseen until deployed.
After: Bloodied and retracted after killing the Voord, later wielded by Ian in the second attack.
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S1E21 · The Sea of Death
Ian rescues Arbitan from Voord attack

Arbitan’s knife is used by Ian to kill the Voord assassin attacking Arbitan. The knife is a critical tool in the rescue, symbolizing the desperate and violent nature of the conflict within the pyramid. Its presence highlights the lethal stakes of the Voord’s infiltration and the need for immediate action to defend the pyramid’s guardian. The knife is wielded decisively by Ian, reflecting his resourcefulness and protective instincts.

Before: Possessed by Arbitan, used as a defensive tool against Voord intruders.
After: Used by Ian to kill the Voord assassin, then presumably returned to Arbitan or retained by Ian for further defense.
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