Fabula
S20E12 · Mawdryn Undead Part 4

Doctor halts TARDIS departure to confront paradox

The Doctor orders the group to remain in the TARDIS as he prepares to lift off, but Nyssa’s quick observation of Turlough’s presence interrupts his plan. When Brigadier ‘83 raises objections about separating his alternate self from the 1977 version, the Doctor dismisses his concerns with blunt clarity. His authoritative command to stay marks a sudden pivot, revealing the deeper temporal crisis they face—one that demands immediate resolution before the TARDIS can leave. This moment forces the Doctor to prioritize a paradox he has yet to fully address, setting the stage for the coming sacrifice.

Plot Beats

The narrative micro-steps within this event

2

The Doctor expresses urgency to leave with the Tardis, and Nyssa mentions separating the two Brigadiers.

urgency to concern ['Inside the Tardis']

The Doctor instructs everyone to stay while he presumably goes to address the situation.

determination to resolve ['inside the Tardis']

Who Was There

Characters present in this moment

4

Anxious and frustrated, feeling sidelined in a crisis where personal time and identity are at stake.

The 1983 version of the Brigadier expresses hesitation and frustration at the suggestion of separation from his 1977 self. He tries to assert his concerns, referencing the personal cost of potential limbo aboard the TARDIS.

Goals in this moment
  • Protect his own timeline and avoid being separated from six years of his life
  • Express concern about the consequences of temporal manipulation
Active beliefs
  • Time should not be manipulated in ways that erase personal continuity
  • The Doctor’s decisions may have unforeseen personal costs
Character traits
hesitant frustrated protective of self
Follow Brigadier Alistair …'s journey

Driven by a blend of professional urgency and unspoken dread, masking concern with brusque efficiency.

The Doctor stands at the TARDIS console, preparing to override systems and lift off under extreme temporal pressure. His voice cuts through objections with concise, urgent authority, reflecting a stark awareness that delay risks irreversible consequences.

Goals in this moment
  • Secure immediate departure from the temporal breach to prevent further instability
  • Prioritize resolving the Brigadier paradox to stabilize the TARDIS
Active beliefs
  • Temporal crises require immediate, decisive action over deliberation
  • The Doctor bears ultimate responsibility for the safety of the TARDIS and its crew
Character traits
authoritative urgent decisive pragmatic
Follow The Fifth …'s journey

Alert and slightly tense, driven by a need to correct the immediate course of action.

Nyssa quickly intervenes by reminding the Doctor of the need to separate the two Brigadiers, demonstrating her grasp of the temporal mechanics at play. She observes Turlough’s presence via the scanner and acts to realign the team’s focus toward resolving the paradox.

Goals in this moment
  • Ensure the Doctor addresses the temporal duplication of the Brigadier
  • Facilitate a resolution that prevents further paradoxical damage
Active beliefs
  • Temporal anomalies must be corrected without delay to avoid escalation
  • The Doctor’s expertise is essential but must be properly guided
Character traits
observant proactive logical
Follow Nyssa's journey
Supporting 1
Tegan Jovanka
secondary

Attentive and watchful, processing the unfolding crisis without immediate verbal intervention.

Tegan remains largely silent, observing the exchange. She notes the absence of Turlough early on, indicating her attentiveness to their environment and companions despite the urgency.

Goals in this moment
  • Stay aware of potential threats or inconsistencies in their surroundings
  • Trust the Doctor’s decisions while maintaining situational awareness
Active beliefs
  • Trust in the Doctor’s judgment despite chaos
  • Vigilance is necessary in unstable environments
Character traits
observant reserved
Follow Tegan Jovanka's journey

Objects Involved

Significant items in this scene

3
TARDIS Console Scanner

The TARDIS Communication Scanner is used by Nyssa to track Turlough’s presence in the corridor and to ground the discussion about separating the duplicate Brigadiers. It becomes a focal point for observing the immediate crisis unfolding aboard the ship.

Before: Operational and projecting monochrome visuals. Brigadier’s duplicate (1977) …
After: Still operational, having provided critical visual confirmation of …
Before: Operational and projecting monochrome visuals. Brigadier’s duplicate (1977) and Turlough’s movement are detected via the scanner.
After: Still operational, having provided critical visual confirmation of Turlough’s location and the temporal anomaly.
TARDIS Exterior Door

The TARDIS Corridor Doors are opened by the Doctor under abrupt urgency, allowing visual proof of the crisis through the scanner and signaling an imminent but aborted attempt at escape from the temporal anomaly.

Before: Closed and sealed, separating the console room from …
After: Pulled open suddenly, revealing the corridor briefly before …
Before: Closed and sealed, separating the console room from the corridor.
After: Pulled open suddenly, revealing the corridor briefly before the Doctor commands the group to remain inside.
The Doctor’s TARDIS

The Doctor’s TARDIS is the central vehicle and setting for the event, straining under the weight of temporal breaches. The console flickers with warnings as the Doctor attempts to initiate emergency departure sequences.

Before: Already damaged by temporal strain. Central console pulses …
After: Still in active crisis mode, engines attempting lift-off …
Before: Already damaged by temporal strain. Central console pulses with overload warnings.
After: Still in active crisis mode, engines attempting lift-off despite internal and external disturbances.

Location Details

Places and their significance in this event

1
TARDIS Central Control Chamber

The TARDIS Console Room serves as the control center for the crew’s response to the temporal crisis. Emergency diagnostics cast shadows across curved walls as the Doctor attempts to override systems, while the duplication of the Brigadier physically presses against the room’s constraints.

Atmosphere Urgent and pressurized with the scent of ozone and the hum of overloaded circuits, the …
Function Command center under extreme duress, where critical operational decisions are made and carried out in …
Symbolism Represents the fragile boundary between order and chaos, where time itself is weaponized and authority …
Access Restricted to the TARDIS crew and immediate participants in the crisis.
Dashed lighting from emergency diagnostics casting shifting shadows Ozone smell from overloading circuits

Narrative Connections

How this event relates to others in the story

What this causes 3

"The Doctor's urgency to escape in the TARDIS (Act 1) leads to the rapid aging of Nyssa and Tegan (Act 2), as they were contaminated by Mawdryn when they carried him into the TARDIS."

Companions revert as time spirals out of control
S20E12 · Mawdryn Undead Part 4

"The Doctor's urgency to escape in the TARDIS (Act 1) leads to the rapid aging of Nyssa and Tegan (Act 2), as they were contaminated by Mawdryn when they carried him into the TARDIS."

Turlough tries to strand the Brigadier via transmat
S20E12 · Mawdryn Undead Part 4

"The Doctor's urgency to escape in the TARDIS (Act 1) leads to the rapid aging of Nyssa and Tegan (Act 2), as they were contaminated by Mawdryn when they carried him into the TARDIS."

Doctor sacrifices his regenerations for companions
S20E12 · Mawdryn Undead Part 4

Key Dialogue

"DOCTOR: Stay here, all of you."