S6E22 · The Krotons Part 4 graph

Krotons detect and target Doctor and Zoe

The Krotons, already destabilized by the earthquake and the Doctor’s sabotage attempts, detect an external attack on their Dynatrope. Their crystalline heads spin rapidly as they assess the damage, cutting auxiliaries and rerouting emergency power to stabilize the system. When their scans reveal the Doctor and Zoe—identified as 'high brains'—dragging Thara to safety in the Under Hall, the Krotons immediately recognize them as both a threat and a potential solution to their failing power source. The revelation triggers an urgent command to capture the pair, escalating the immediate danger to the TARDIS crew and tightening the narrative tension around the Doctor’s mission to destroy the Dynatrope before the Krotons can escape. The exchange underscores the Krotons’ desperation and the high stakes of the conflict, as their focus shifts from stabilization to acquisition of the Doctor and Zoe’s intellects—either to exploit or eliminate them.

Plot Beats

The narrative micro-steps within this event

2

The Krotons struggle to stabilize the Dynatrope after the earthquake, cutting auxiliaries and feeding in emergency power, confirming that an attack has occurred.

urgency to confirmation

Seeing the Doctor and Zoe helping Thara on the monitor, the Krotons realize the "high brains" are present and order their capture, indicating that the Doctor and Zoe are viewed as a critical asset that they need.

alarm to determination

Who Was There

Characters present in this moment

6

Unseen but inferred as determined—focused on escape and Thara’s survival, unaware of the Krotons’ predatory lock-on.

Zoe is off-screen but actively referenced by the Krotons as a 'high brain'—a target for capture due to her intellectual capacity. Her presence in the Under Hall, aiding the Doctor in dragging Thara to safety, is detected via the Krotons’ surveillance monitors, marking her as both a fugitive and a prized resource for their failing power systems.

Goals in this moment
  • Ensure Thara’s safe extraction from the collapsing Under Hall
  • Avoid Kroton capture to prevent her intellect from powering their escape
Active beliefs
  • The Krotons’ power source must be destroyed to free the Gonds
  • Her scientific mind is a liability in this conflict (subconsciously acknowledged)
Character traits
Resourceful under pressure Highly intelligent (exploited by the Krotons) Loyal to allies (protecting Thara) Unwittingly central to the Krotons’ survival strategy
Follow Zoe Heriot's journey

Urgent and calculating—his desperation is masked by mechanical precision, but the stakes (dwindling power reserves) fuel his predatory focus on the Doctor and Zoe.

The Kroton leads the stabilization efforts in the Dynatrope control room, his crystalline head spinning rapidly as he issues commands to cut auxiliaries and reroute emergency power. Once balance is restored, he shifts focus to the monitors, where he identifies the Doctor and Zoe as 'high brains' and orders their capture. His actions are cold, mechanical, and driven by survival instinct—exemplifying the Krotons’ ruthless logic.

Goals in this moment
  • Stabilize the Dynatrope to prevent immediate collapse
  • Capture the Doctor and Zoe to replenish power reserves and ensure escape
Active beliefs
  • High-brain organics are the only viable solution to their power crisis
  • The Gonds’ resistance is a secondary threat compared to system failure
Character traits
Ruthlessly efficient Protocol-bound (prioritizing collective survival) Predatory (targeting intellects as resources) Adaptive (shifting from stabilization to acquisition)
Follow Lead Kroton's journey
Thara
primary

Distressed and likely in pain—his injury and reliance on the Doctor/Zoe create tension, while his off-screen status heightens the urgency of his rescue.

Thara is the vulnerable focal point of the Doctor and Zoe’s rescue efforts, his injury pinning him in the Under Hall as the Krotons’ monitors track his movement. Though physically absent from the Dynatrope control room, his presence is implied through the Krotons’ detection of the 'high brains' aiding his escape, making him an indirect pawn in the Krotons’ hunt.

Goals in this moment
  • Survive the collapse of the Under Hall
  • Avoid Kroton capture to prevent his people’s further subjugation
Active beliefs
  • The Doctor and Zoe are his only hope for escape
  • His injury is a liability that endangers his allies
Character traits
Physically compromised (limiting his agency) Symbol of Gond resistance (targeted indirectly) Dependent on allies for survival Unwittingly central to Kroton surveillance
Follow Thara's journey

Focused and urgent—driven by the need to outmaneuver the Krotons while ensuring Thara’s survival, likely unaware of the immediate Kroton threat.

The Doctor is physically absent from the Dynatrope control room but is the primary target of the Krotons’ surveillance. His actions—dragging Thara to safety in the Under Hall—are monitored in real-time, revealing his status as a 'high brain' and triggering the Krotons’ capture order. His off-screen presence looms large, symbolizing both the threat to Kroton survival and the key to their downfall.

Goals in this moment
  • Secure Thara’s escape from the Under Hall before Kroton retaliation
  • Sabotage the Dynatrope to prevent Kroton escape (long-term objective)
Active beliefs
  • The Krotons’ power source is their Achilles’ heel
  • Intellectuals like himself and Zoe are the Krotons’ primary targets
Character traits
Strategic thinker (sabotage efforts implied) Protective of companions (prioritizing Thara’s rescue) Unwitting catalyst for Kroton desperation Adaptable in crisis (improvised escape tactics)
Follow The Second …'s journey
Supporting 1
Kroton 2
secondary

Focused and unemotional—his actions are purely operational, reflecting the Krotons’ collective mindset without personal investment.

Kroton 2 serves as the Kroton’s subordinate, executing technical commands to cut auxiliaries, confirm power rerouting, and report on the Dynatrope’s status. His role is functional, reinforcing the Krotons’ hierarchical structure. When the monitors reveal the Doctor and Zoe, he identifies them as the targets, his actions seamless extensions of the Kroton’s orders.

Goals in this moment
  • Support the Kroton’s stabilization efforts
  • Facilitate the capture of the Doctor and Zoe as ordered
Active beliefs
  • The Dynatrope’s survival is paramount
  • High-brain organics are necessary for escape
Character traits
Obedient to hierarchy Technically precise Emotionally detached (mechanical execution) Reactive (responding to Kroton’s directives)
Follow Kroton 2's journey
Jamie McCrimmon

Jamie is briefly mentioned as 'picking his way through the shaking spaceship' toward the exit, his presence in the Dynatrope …

Objects Involved

Significant items in this scene

2
Dynatrope Control Room Pipes and Cables

The Dynatrope’s pipes and cables are integral to the Krotons’ stabilization efforts, their rattling and sparking reflecting the machine’s instability. As the Krotons cut auxiliaries and reroute power, these exposed conduits become visual and auditory cues of the Dynatrope’s precarious state. Their hazardous condition—whipping and loose—mirrors the urgency of the Krotons’ actions, creating a gauntlet-like atmosphere in the control room that heightens the tension of the scene.

Before: Damaged and unstable, with loose fittings and sparking …
After: Temporarily stabilized but still volatile, their condition a …
Before: Damaged and unstable, with loose fittings and sparking cables, exacerbating the Dynatrope’s failure.
After: Temporarily stabilized but still volatile, their condition a reminder of the Dynatrope’s fragility and the Krotons’ desperation.
Dynatrope Core Power Generation System

The Dynatrope is the critical power source at the heart of this event, its instability driving the Krotons’ frantic actions. As the Krotons cut auxiliaries and reroute emergency power, the Dynatrope’s balance is temporarily restored, but its precarious state is underscored by the urgency of their commands. The machine’s monitors reveal the Doctor and Zoe, triggering the Krotons’ predatory response. Its role as both a target for sabotage and a lifeline for the Krotons elevates its narrative significance, symbolizing the fragile tension between destruction and survival.

Before: Failing due to earthquake damage and sabotage, with …
After: Stabilized for the moment, but still vulnerable—its balance …
Before: Failing due to earthquake damage and sabotage, with power reserves critically low (implied by the Krotons’ desperate measures).
After: Stabilized for the moment, but still vulnerable—its balance is restored, but the Krotons’ focus shifts to acquiring the Doctor and Zoe as a power source, setting the stage for further conflict.

Location Details

Places and their significance in this event

2
Dynatrope Interior (Control Room)

The Dynatrope control room is the nerve center of this event, where the Krotons’ mechanical logic clashes with the Doctor’s defiance. The space is cramped and chaotic, with pipes and cables snaking across shaking walls, reflecting the Dynatrope’s instability. Here, the Krotons issue commands to stabilize their power source, only to pivot to predatory focus when their monitors reveal the Doctor and Zoe. The room’s oppressive atmosphere—filled with the hum of machinery and the urgency of Kroton voices—amplifies the stakes, making it a battleground of wills and a ticking clock for the TARDIS crew.

Atmosphere Tense and claustrophobic, with the hum of failing machinery and the Krotons’ urgent, mechanical voices …
Function Command center for Kroton operations and the launchpad for their hunt for the Doctor and …
Symbolism Represents the Krotons’ fading control and the shifting power dynamics—from technical crisis to intellectual conquest. …
Access Restricted to Krotons only; no Gonds or outsiders are present or permitted.
Crystalline Krotons hunched over surveillance consoles Pipes and cables rattling and sparking across the walls Monitors displaying the Doctor and Zoe in the Under Hall The Krotons’ heads spinning rapidly during assessment, then stopping abruptly
Under Hall

The Under Hall, though not physically depicted in this event, is the off-screen battleground where the Doctor and Zoe drag Thara to safety. Its role is implied through the Krotons’ monitors, which reveal the trio’s movement as they flee the collapsing space. The Hall’s instability—dust, debris, and vibrations—creates a sense of urgency, while its connection to the Dynatrope control room via surveillance turns it into a hunted refuge. The location’s symbolic weight lies in its dual role as both a sanctuary and a target, reflecting the broader struggle for Gond survival.

Atmosphere Chaotic and precarious, with dust hanging thick in the air and debris crashing from the …
Function Escape route and temporary refuge for the Doctor, Zoe, and Thara, but also a location …
Access Open to Gonds and the TARDIS crew, but monitored by the Krotons via their surveillance …
Dust and debris filling the air Vibrations and unstable walls A beam pinning Thara’s leg (implied by the Doctor and Zoe’s rescue efforts) Kroton monitors tracking movement in real-time

Organizations Involved

Institutional presence and influence

2
Krotons

The Krotons, as a collective crystalline organization, dominate this event through their hierarchical command structure. Led by the Kroton, they prioritize stabilizing the Dynatrope before pivoting to acquire the Doctor and Zoe as 'high brains.' Their actions—cutting auxiliaries, rerouting power, and issuing capture orders—reflect a ruthless, protocol-driven logic where individual lives are expendable. The organization’s desperation is palpable, as their survival hinges on both technical fixes and predatory acquisition, revealing their vulnerability beneath the mechanical facade.

Representation Through the Kroton’s direct commands and Kroton 2’s execution of technical tasks, embodying the collective’s …
Power Dynamics Exercising authority over the Dynatrope and its surroundings, but operating under constraint due to dwindling …
Impact The Krotons’ actions here underscore their declining control, as their focus shifts from stabilization to …
Internal Dynamics Hierarchical and protocol-bound, with the Kroton as the decisive leader and Kroton 2 as the …
Stabilize the Dynatrope to prevent immediate collapse and ensure escape Capture the Doctor and Zoe to replenish power reserves and secure their departure Technical control over the Dynatrope’s systems (cutting auxiliaries, rerouting power) Surveillance and monitoring (identifying targets via monitors) Direct commands to subordinates (Kroton 2’s execution of orders) Threat of lethal force (implied by their ruthless logic)
Gond Indigenous Population

The Gond Society is indirectly but critically involved in this event, as their resistance efforts—implied by the Krotons’ detection of an 'attack on the Dynatrope'—provide the context for the Doctor and Zoe’s actions. Though not physically present, their struggle is the catalyst for the Krotons’ shift from stabilization to acquisition. The Gonds’ defiance, symbolized by Thara’s injury and the Doctor/Zoe’s rescue, frames the Krotons’ predatory response as both a retaliation and a last-ditch effort to reclaim dominance. Their role is passive here but foundational to the conflict.

Representation Via the implied resistance efforts (attack on the Dynatrope) and the Doctor/Zoe’s aid to Thara, …
Power Dynamics Being challenged by external forces (the Doctor, Zoe, and Gond resistance), but their power is …
Impact The Gonds’ indirect influence here is to elevate the stakes—their resistance forces the Krotons to …
Internal Dynamics Factional tensions are implied (e.g., Selris’ caution vs. Thara’s boldness), but in this moment, their …
Support the Doctor and Zoe’s sabotage efforts to destroy the Dynatrope Protect Thara and other injured Gonds from Kroton retaliation Alliance with the Doctor and Zoe (providing local knowledge and resources) Sabotage (acid production, attacks on the Dynatrope) Symbolic resistance (Thara’s leadership and defiance)

Narrative Connections

How this event relates to others in the story

Within this episode

What this causes 1

"The Krotons realize the "high brains" (Doctor and Zoe) are present and order their capture. The Kroton then emerges, demanding the Doctor and Zoe be handed over and also reveals why: they need 'high brains' to operate the Dynatrope, solidifying the direct link between the Krotons' awareness and their actions."

Eelek surrenders the Doctor and Zoe
S6E22 · The Krotons Part 4

Across episodes

Threads arriving here 14

"The Krotons prioritizing the capture of the Doctor and Zoe in Ep 21 is directly echoed when they prioritize their capture again in Ep 22, demonstrating their persistent focus on 'high brains.'"

Kroton prioritizes capture over destruction
S6E21 · The Krotons Part 3

"Thara's frustration with Selris' inaction in Part 3 (leading her to support Eelek's rebellion) directly causes the Gonds' covert assault on the Dynatrope in Part 4. This escalates the Krotons' detection of the Doctor and Zoe as 'high brains' during the earthquake aftermath, triggering the Dynatrope’s response."

Thara Challenges Selris’ Passivity
S6E21 · The Krotons Part 3

"Kroton 2's prioritization of capturing the Doctor and Zoe (Episode 21) directly causes the Krotons' urgent reaction to detect and target them in Episode 22 after sensing an external attack on the Dynatrope."

Kroton prioritizes capture over destruction
S6E21 · The Krotons Part 3

"Jamie's escape in Episode 21 allows him to assist the Doctor's sabotage efforts in Episode 22 by rallying Gonds and pouring acid on the Krotons' power source."

Jamie escapes while Krotons focus on Dynatrope failure
S6E21 · The Krotons Part 3

"The Krotons recognize Jamie's value as an intelligence asset in Episode 21, which directly leads to their efforts to target him in Episode 22."

Kroton 2 revalues Jamie as intelligence asset
S6E21 · The Krotons Part 3

"The Krotons' revaluation of Jamie as an intelligence asset (Part 3) directly leads to their heightened awareness of him in Part 4, where they actively target him as one of the 'high brains' they need to capture."

Kroton 2 revalues Jamie as intelligence asset
S6E21 · The Krotons Part 3

"Eelek's defiance in Episode 21 echoes in the Krotons' detection of the Gond attack in Episode 22, creating a shared sense of escalating threat."

Beta resists Eelek’s war ultimatum
S6E21 · The Krotons Part 3

"The Krotons' strategic shift in revaluing Jamie as an intelligence asset leads to their immediate targeting of the Doctor and Zoe when their position is compromised."

Kroton 2 revalues Jamie as intelligence asset
S6E21 · The Krotons Part 3

"The Krotons' activation of 'vision control' to suppress the Gonds (Episode 21) escalates into a direct declaration of needing 'high brains' to power the Dynatrope (Episode 22), sharpening the stakes around the Doctor and Zoe's captivity."

Kroton Commander activates vision control
S6E21 · The Krotons Part 3

"The Krotons’ activation of 'vision control' in Part 3 foreshadows their heightened surveillance and detection of the Doctor and Zoe in Part 4, explaining how they efficiently target them."

Kroton Commander activates vision control
S6E21 · The Krotons Part 3

"Jamie's failed attack on the Kroton in Episode 21 foreshadows the Gonds' more coordinated but still risky attack on the Dynatrope in Episode 22."

Jamie’s desperate Kroton attack fails
S6E21 · The Krotons Part 3

"The Doctor's intervention to halt Eelek's suicide attack in Episode 21 mirrors the Krotons' own targeting of the Doctor and Zoe in Episode 22."

Doctor Halts Gond Suicide Attack
S6E21 · The Krotons Part 3

"Selris’s divisive sabotage plan in Episode 21 and the earthquake's damage in Episode 22 both represent the fragmentation of Gond society under Kroton oppression."

Selris unveils sabotage plan after Eelek’s defiance
S6E21 · The Krotons Part 3

"The Krotons' activation of 'vision control' (Episode 21) mirrors their later detection and targeting of the Doctor and Zoe via surveillance (Episode 22), both reflecting paranoia and technological dominance."

Kroton Commander activates vision control
S6E21 · The Krotons Part 3
Threads leading onward 2

"The Krotons' demand for 'high brains' (Zoe and the Doctor) to control the Dynatrope escalates to Eldred's distrust and hostility toward the TARDIS crew in Episode 23, where he immediately arms himself upon their arrival in the space museum."

Eldred Draws a Weapon on the Doctor
S6E23 · The Seeds of Death Part …

"The Krotons' monitoring of 'high brains' (Doctor and Zoe) in Episode 22 mirrors the Space Museum's exhibits and the T-Mat system's surveillance in Episode 23. Both scenarios pit human (or quasi-human) intellect against automated, dehumanizing systems."

Zoe activates the Travel-Mat video
S6E23 · The Seeds of Death Part …

Part of Larger Arcs

Key Dialogue

"KROTON: Cut auxiliaries."
"KROTON 2: Auxiliaries cut. Output zero."
"KROTON: Feed in emergency power. Gravitation feed check."
"KROTON 2: Static."
"KROTON: Dynatrope balance normal."
"KROTON 2: The Gonds have attacked the Dynatrope."
"KROTON: The two high brains are there. Bring them here."