Object

Psychotronic Focus Crystal

A crystalline device serving as a controllable conduit for psychic energy, wielded as a weapon and key by the Master during a confrontation in the Xeraphin’s chamber

4 appearances

Appearances in the Narrative

When this object appears and how it's used

4 moments

S19E25 · Time Flight Part 3

Master demands TARDIS key at gunpoint

The psychotronic focus crystal becomes a focal point during the confrontation, though its primary role as a telepathic amplifier for the Master's demands is only partially realized. Hayter comments on its lack of conventional connection, while the Doctor dismisses its importance beyond being a communication focus.

Before: Present in the chamber, lighting and pulsing subtly

After: Still present, though its telepathic function remains ambiguous in the immediate threat scenario

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S19E25 · Time Flight Part 3

Master seizes Doctor’s TARDIS key

The Psychotronic Focus Crystal pulses more visibly as the Master speaks telepathically through it, his demands radiating into the minds of the prisoners and amplifying his coercive demands. It serves both as a focus for telepathic communication and as a visual nexus of the surreal, man-made intrusions into the Xeraphin’s realm.

Before: Positioned on the chamber dais, its latent power responding to the Master’s proximity or touch

After: Unchanged in location but heightened by the Master’s telepathic invocation, carrying the imprint of new threats

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S19E25 · Time Flight Part 3

Doctor chooses Hayter to enter the sanctum

The crystal emits escalating telepathic energy, amplifying the Master’s voice and inducing hallucinations that incapacitate some characters. Its pulsating glow and hum underscores its role as both conduit and catalyst for the chamber’s unstable reality.

Before: Active within the chamber, reacting to the Master’s touch and demands

After: Active, its psychic influence intensifies as the confrontation peaks

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S19E25 · Time Flight Part 3

Stapley and Bilton pinpoint sanctum location

The Psychotronic Focus Crystal is referenced again as the Doctor explains its role as a telepathic communication focus, dismissing Scobie’s radio link assumption. Its functional purpose as a conduit for psychic influence becomes central to the Doctor’s caution about proximity to the sanctum’s unstable power core.

Before: Held by the Master who uses it to amplify his commands and threats, humming with latent energy while held close to prisoners’ minds.

After: Remains in the Master’s possession as he enters the TARDIS, its function shifting dangerously closer to weaponized control over the Doctor and his allies.

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