Fabula
S2E22 · Shades of Gray

Repellent Frequency Test — Pulaski Reprograms the Stimulator

After Troi reframes the problem — that the organism is keyed to the emotions, not the facts, of Riker's memories — Pulaski makes a hard, experimental pivot. She hypothesizes that different endorphin signatures might repel rather than feed the microbe, and quickly reprograms the neural stimulator to emit a modified differential-current pattern. The device is activated: this decisive, morally fraught test shifts treatment from placation to countermeasure and immediately becomes the story's tactical turning point, its success or failure bearing directly on Riker's survival.

Plot Beats

The narrative micro-steps within this event

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Troi and Pulaski lock the treatment angle: if some endorphins attract the organisms, others could repel them.

uncertainty to cautious hope

Pulaski acts on the insight—she drives the device controls, changes the differential current pattern, and activates the machine to test the new strategy.

deliberation to decisive action

Who Was There

Characters present in this moment

4

Non‑emotional biological responsiveness — functionally 'reactive' to endorphin signatures, increasing proliferation when fed attractive signals.

The endorphin‑sensitive organism is the targeted antagonist: its growth is described as tied to memory‑generated chemicals and is implicitly the biological system Pulaski's reprogramming aims to repel or suppress.

Goals in this moment
  • To proliferate within the host's nervous system.
  • To exploit neurochemical patterns produced by the host's memories to accelerate growth.
Active beliefs
  • The organism 'expects' and benefits from certain neurochemical patterns (inferred behavior).
  • Altering those chemical signals will change its growth dynamics and can be used against it.
Character traits
chemically responsive adaptive parasitic opportunistic
Follow Endorphin-Sensitive Organism's journey

Determined and focused with an undercurrent of controlled urgency — clinical composure masking worry for the patient and acceptance of ethical risk.

Pulaski moves decisively from the monitor to Troi's side, voices a hypothesis tying organism activity to endorphins, rapidly manipulates the stimulator controls and activates the device — taking immediate, experimental clinical action.

Goals in this moment
  • To test the endorphin‑based hypothesis by changing the stimulator's differential current pattern.
  • To arrest or repel the organism's growth before it reaches Riker's brain.
  • To convert diagnostic insight into an actionable treatment that can save the patient.
Active beliefs
  • The organism's proliferation is driven by neurochemical/endophinic signals rather than factual content.
  • Active alteration of neural stimulation can alter the organism's behavior and therefore the patient's prognosis.
  • Taking experimental medical risk is justified when standard protocols cannot stop the infection.
Character traits
decisive clinical experimentally bold procedurally efficient
Follow Katherine Pulaski's journey

Not directly observed in the scene — implicitly passive and at risk, his personal memories and emotions are being used as a treatment vector.

Riker is the unconscious/compromised patient whose memory‑driven emotional chemistry is the variable under manipulation; his neural state is being probed and altered without his conscious input as clinicians attempt to halt the organism.

Goals in this moment
  • To survive the infection (implicit patient goal).
  • To have the medical team successfully arrest the organism before neural damage occurs.
Active beliefs
  • Implicit trust in the Enterprise medical staff to take necessary action.
  • No belief-driven agency in this moment due to compromised state; nevertheless his prior choices and memories are central to treatment.
Character traits
vulnerable (in this context) unwitting subject previously stoic (contextual trait)
Follow William Riker's journey

Concerned and intensely focused — professionally calm while personally invested in Riker's survival.

Troi synthesizes clinical observation with empathic insight, reframing the problem as emotion‑driven; she stands at Pulaski's side and supplies the conceptual key (endorphins) that enables the experimental intervention.

Goals in this moment
  • To clarify that emotional chemistry, not content, is driving the organism's response.
  • To guide Pulaski toward a treatment strategy that manipulates those neurochemical signals.
  • To protect Riker by ensuring the chosen intervention is informed by empathic understanding.
Active beliefs
  • Emotions produce distinct neurochemical signatures (endorphins) that the organism can detect.
  • Psychological and medical approaches must be integrated to treat this infection.
  • Informing clinicians of the emotional dynamics will improve the chance of patient survival.
Character traits
insightful empathetic calmly persuasive observational
Follow Deanna Troi's journey

Objects Involved

Significant items in this scene

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Wesley Crusher's Tractor Beam Device (School Project Repulsor Beam with Tube and Fiber Optic Attachment)

The compact stimulator device (represented by the canonical, jury‑rigged apparatus) is physically manipulated by Pulaski: she alters its differential current pattern via the controls and activates it, turning it from a diagnostic tool into an experimental countermeasure aimed directly at the organism's neurochemical sensitivities.

Before: Prepared and within reach of the medical team; …
After: Activated — emitting a modified differential current pattern …
Before: Prepared and within reach of the medical team; controls set to prior parameters while clinicians discuss hypotheses.
After: Activated — emitting a modified differential current pattern as Pulaski initiates the experimental treatment; now the active agent in the clinical test.
Sickbay Vital Signs Monitor Array

The Sickbay Vital Signs Monitor Array anchors the clinical reading that provokes Pulaski's line of thought; she moves from the monitor to Troi's side after interpreting its data, so the array functions as diagnostic stimulus and ongoing status relay while the experiment proceeds.

Before: Active and displaying waveforms, numeric vitals, and alarm …
After: Continuing to display vital signs and respond to …
Before: Active and displaying waveforms, numeric vitals, and alarm tones that indicate the patient's unstable condition.
After: Continuing to display vital signs and respond to the neural stimulation change; remains the primary readout for clinicians to observe effects.

Location Details

Places and their significance in this event

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Enterprise Sickbay

Enterprise Sickbay is the clinical arena where diagnosis becomes experiment: its compact, antiseptic geometry focuses attention on a single life; the space contains monitors, consoles and the stimulator, enabling rapid procedural improvisation and heightening the scene's ethical stakes.

Atmosphere Tense, clinical, and urgent — quiet professionalism layered over personal anxiety, with a low mechanical …
Function Treatment site and improvised battleground where medical authority makes ethically fraught choices to defend a …
Symbolism Represents the institution's power and limits: a refuge of expertise that also forces clinicians into …
Access Restricted to medical personnel and essential command staff; only the sickbay team is directly manipulating …
Cool overhead clinical lighting Monitors with waveform traces and alarm chirps A low mechanical hum from equipment and an intimate, crowded working area around a single biobed

Narrative Connections

How this event relates to others in the story

What led here 2
Causal

"The spike in microbial growth triggers Pulaski and Troi to link the change to Riker’s memories."

Pleasure Feeds the Vine — Therapy Backfires
S2E22 · Shades of Gray
Causal

"Hypothesis that some endorphins repel the organisms leads to adjusting the stimulator’s current pattern."

Endorphins Feed the Vine — Pulaski Reprograms the Stimulator
S2E22 · Shades of Gray
What this causes 3
Causal

"Hypothesis that some endorphins repel the organisms leads to adjusting the stimulator’s current pattern."

Endorphins Feed the Vine — Pulaski Reprograms the Stimulator
S2E22 · Shades of Gray
NARRATIVELY_FOLLOWS medium

"The new strategy immediately drives Riker into grief-laden memories, starting with Tasha’s death."

Parley, Refusal, and Sacrifice at the Shroud
S2E22 · Shades of Gray
NARRATIVELY_FOLLOWS medium

"The new strategy immediately drives Riker into grief-laden memories, starting with Tasha’s death."

Armus' Fatal Blow — Tasha Falls
S2E22 · Shades of Gray

Key Dialogue

"Pulaski: "Now we know the organism's growth rate is related to the memories he's experiencing.""
"Troi: "Or the emotions they produce.""
"Pulaski: "I'm going to change the differential current pattern and see what happens.""