Acid jar mission proposed and launched

Range explains the colony's failed energy systems and the impossibility of repairs without fuel. Norna proposes a radical solution—a wind-powered acid jar stored in the medical research room—as an alternative power source. In the tense aftermath of the TARDIS landing mishap, Tegan and Turlough see the suggestion as the only way to stabilize their escape. The urgency of the situation and the colony’s dire straits force the trio to risk breaking into a restricted area, staking their survival on an unproven and dangerous device. This sets in motion a high-stakes mission with immediate physical and political consequences. key_dialogue: [ NORNA: Well, we used to use an acid jar charged by wind power. TEGAN: Acid jar? NORNA: A sort of large battery. ]

Plot Beats

The narrative micro-steps within this event

2

Norna suggests using an acid jar charged by wind power as an alternative to electricity, sparking interest in a potential solution.

cautious optimism to hope ['Medical Centre']

The group decides to retrieve the acid jar from the research room, with Tegan and others preparing to assist Norna.

hope to determination ['Medical Centre', 'research room']

Who Was There

Characters present in this moment

5

Determined resolve fueled by frustration with inaction, masking any hesitation.

Reacting to stalled escape plans, immediately grasps the acid jar’s potential and volunteers to retrieve it despite danger. Her decisiveness reflects on-the-ground adaptability.

Goals in this moment
  • Secure a working power source for the TARDIS to escape the planet.
  • Assist Norna in retrieving forbidden equipment without delay.
Active beliefs
  • Even desperate improvisation can yield survival if pursued with alacrity.
  • Loyalty to companions outweighs bureaucratic restrictions.
Character traits
Quick to act Risk-tolerant pragmatist Collaborative urgency
Follow Tegan Jovanka's journey
Norna
primary

Calm efficiency under pressure, though hinting at determination to act despite obstacles.

Proposes and owns the acid jar solution after Range outlines the crisis, assuming responsibility for retrieval and delivery despite restricted access.

Goals in this moment
  • Deliver a working energy source to stabilize the colony and TARDIS.
  • Navigate sanctioned access barriers to secure critical equipment.
Active beliefs
  • Survival justifies bending dispensable regulations.
  • Even outdated technology deserves a second chance when urgent.
Character traits
Resourceful assistant Committed problem-solver Willing to defy restrictions
Follow Norna's journey

Professionally detached calm masking underlying frustration at decades of accumulated knowledge rendered useless.

Shares bleak assessment of the colony’s failed energy systems and dismisses the colony ship as irreparable, prioritizing immediate diagnostics over false hope. Expresses curiosity about usable voltage sources on the planet.

Goals in this moment
  • Secure viable power source to sustain colony operations.
  • Preserve scientific integrity amid immediate survival demands.
Active beliefs
  • Technological solutions must be grounded in verifiable physics rather than wishful thinking.
  • Colony survival depends on leveraging even obsolete knowledge before it is lost.
Character traits
Pragmatic scientist Leadership under pressure Technical realism
Follow Range (Frontios …'s journey
Supporting 2

Cautiously optimistic, balancing practical caution with inventive hope.

Contributes to the technical solution by conjecturing about voltage enhancement through an interrupter. Functions as a technical bridge between new and native expertise.

Goals in this moment
  • Enable immediate power stabilization for escape and colony relief.
  • Leverage TARDIS equipment despite spatial distortion constraints.
Active beliefs
  • Constraints breed innovation when necessity demands it.
  • Resourceful adaptation can mitigate institutional failure.
Character traits
Pragmatic risk-assessor Inventive under duress Supportive collaborator
Follow Turlough's journey

Focused curiosity tinged with underlying concern for everyone’s safety.

Diagnoses TARDIS door malfunction caused by spatial anomaly, then pivots to consider planetary resources for voltage. His technical curiosity aligns with the group’s immediate need.

Goals in this moment
  • Reclaim the mu-field activator to restore TARDIS systems.
  • Identify functioning local energy sources to stabilize conditions.
Active beliefs
  • Science and improvisation are essential complements in survival scenarios.
  • Even mundane objects may hold untapped utility in critical moments.
Character traits
Analytical problem-solver Adaptable under crisis Technical leadership
Follow The Fifth …'s journey

Objects Involved

Significant items in this scene

3
Portable Mu-Field Activator (from ship's stores)

The mu-field activator is mentioned as a TARDIS device trapped behind the jammed interior door, essential for escape power but currently unattainable. Its absence forces the team to consider alternative energy solutions.

Before: Secured behind the distorted TARDIS door, inaccessible due …
After: Still unattainable, intensifying the need for an external …
Before: Secured behind the distorted TARDIS door, inaccessible due to a spatial anomaly.
After: Still unattainable, intensifying the need for an external power source.
Colony Medical Supplies

The feeble phosphor lamp hanging in the medical centre casts unreliable light during emergency triage, drawing the Doctor’s critique. Its inadequacy highlights the broader energy collapse and spurs consideration of viable alternatives like the acid jar.

Before: Dimming and flickering intermittently, barely illuminating wounded colonists.
After: Unchanged, continuing to underscore the crisis until improved …
Before: Dimming and flickering intermittently, barely illuminating wounded colonists.
After: Unchanged, continuing to underscore the crisis until improved lighting is secured elsewhere.
Acid Jar Battery (Wind-Powered Electrolyte Container)

Norna identifies the obsolete acid jar battery—previously charged by wind turbines—as a potential power source despite its primitive design and long disuse. Tegan and Turlough immediately commit to retrieving it from the restricted research room.

Before: Idle and inert in the research room’s cluttered …
After: Still inert but now targeted for retrieval, signaling …
Before: Idle and inert in the research room’s cluttered storage after years of wind turbine neglect.
After: Still inert but now targeted for retrieval, signaling its transition from museum piece to desperate tool.

Location Details

Places and their significance in this event

2
Colony Medical Center

The medical centre exterior serves as the crisis hub where the Doctor first assesses the colony’s energy failure and spatial anomalies affecting the TARDIS. Tegan bursts in with urgent intel, anchoring the group’s immediate priorities in a shared physical space.

Atmosphere Charged with urgency and faint desperation, lit by sickly emergency bulbs reflecting collapsing systems.
Function Central triage and coordination point for emergency power diagnostics.
Sickly emergency lighting barely piercing the gloom. Sudden arrival of Tegan with alarming news about the TARDIS.
Research Chamber Core Area (Frontios Colony)

The research room houses the colony’s abandoned wind-powered acid jar battery, connected to defunct turbines and critical to the proposed power solution. Norna’s suggestion shifts the group’s focus toward accessing this forbidden space to save their escape.

Atmosphere Functional but neglected, laden with stored materials and charged with a mix of scientific potential …
Function Hidden technical repository and potential command center for salvage operations.
Symbolism Embodies the colony’s loss of technological momentum and need to revisit past solutions.
Access Restricted area requiring special dispensation to enter.
Cluttered work surfaces with outdated documentation. Central station holding an emerald-green electrolyte jar and coiled wind-charged electrodes.

Narrative Connections

How this event relates to others in the story

What led here 5

"Brazen and Range's discussion about closing the research room after Captain Revere's death callbacks to Brazen's earlier cover-up. This recurring theme of suppressed knowledge and distrust of science over militarism re-emerges in the colonists' treatment of the Doctor."

Military authority silences scientific dissent
S21E7 · Frontios Part 1

"The jammed TARDIS interior door creates an urgent need for an alternative power source (the acid jar), driving the companions to retrieve it from the sealed research room. This mechanical failure becomes a central obstacle and motivator for the plot."

Tegan and Turlough discover TARDIS lockout
S21E7 · Frontios Part 1

"Tegan's alarm about the jammed TARDIS door and the companions' discussion of alternatives (mu-field activator, acid jar) directly leads to Norna's suggestion to retrieve the acid jar from the sealed research room, driving the entire retrieval mission."

Acid jar sparks TARDIS repair plan
S21E7 · Frontios Part 1

"Tegan's alarm about the jammed TARDIS door and the companions' discussion of alternatives (mu-field activator, acid jar) directly leads to Norna's suggestion to retrieve the acid jar from the sealed research room, driving the entire retrieval mission."

Weighing risky TARDIS repair options
S21E7 · Frontios Part 1
Causal medium

"The Doctor's initial refusal to visit Frontios due to the Laws of Time creates a immediate urgency when they are forced to land. This tension between his ethical stance and the crisis at hand drives his later pragmatic decisions (e.g., prioritizing the colony's survival over TARDIS repairs)."

Doctor details TARDIS peril to crew
S21E7 · Frontios Part 1
What this causes 3

"Tegan's alarm about the jammed TARDIS door and the companions' discussion of alternatives (mu-field activator, acid jar) directly leads to Norna's suggestion to retrieve the acid jar from the sealed research room, driving the entire retrieval mission."

Acid jar sparks TARDIS repair plan
S21E7 · Frontios Part 1

"Tegan's alarm about the jammed TARDIS door and the companions' discussion of alternatives (mu-field activator, acid jar) directly leads to Norna's suggestion to retrieve the acid jar from the sealed research room, driving the entire retrieval mission."

Weighing risky TARDIS repair options
S21E7 · Frontios Part 1

"Norna's suggestion to use an acid jar battery as an alternative power source directly leads to the perilous mission to retrieve it, including the risks of spilling acid and attracting guards. This plan becomes a critical plot driver."

Retrieving the acid jar battery
S21E7 · Frontios Part 1

Themes This Exemplifies

Thematic resonance and meaning