Doctor Who
S15E24
· The Invasion of Time Part 4

Andred decodes Vardan signal with K9

Commander Andred, now trapped in the TARDIS, pivots from rebellion to necessity as he uses a handheld calculator to begin decoding the Vardan invasion signal. The Doctor’s hasty plan has drawn Andred into the orbit of a greater crisis, forcing the seasoned commander to abandon his coup against the Doctor. K9 provides critical trigonometric calculations, demonstrating how the Doctor’s alliance with former enemies becomes the unexpected key to Gallifrey’s survival. This moment binds the palace revolution and alien invasion into a single strategic front under pressure, reversing prior antagonism into a fragile but functional collaboration. key_dialogue: [ ANDRED: Z over P times log three five nine six equals K9: Cosine four seven three two. ]

Plot Beats

The narrative micro-steps within this event

1

Andred uses a handheld calculator to calculate Z over P times log three five nine six while K9 provides the cosine of four seven three two.

['INT. TARDIS CONSOLE ROOM']

Who Was There

Characters present in this moment

2
Andred
Time Lord Operative
 primary

Desperately determined to reclaim control, masking lingering resentment with concentrated effort

Commander Andred stands stripped of his jacket, sleeves rolled up, fingers flying over a handheld calculator as he inputs trigonometric sequences to break the Vardan encryption. His posture is rigid, expressions tight with focused concentration rather than the defiance of earlier scenes.

Goals in this moment
  • • decode the Vardan invasion signal to protect Gallifrey
  • • suppress personal rebellion against the Doctor to achieve the greater mission
Active beliefs
  • • technological solutions are the only reliable path forward
  • • Gallifrey’s survival overrides personal or political scores
Character traits
disciplined rigidly logical adapting under pressure prioritizing duty over grievance
Follow Andred's journey
K9
Robotic Canine Companion
 primary

Functionally neutral, executing commands with algorithmic efficiency

K9 stands motionless as a tactical node, his armored body angled toward Andred. Unblinking sensors track input calculations while his vocal synthesizer delivers precise trigonometric responses in mechanical cadence.

Goals in this moment
  • • assist Andred in decoding the Vardan signal using trigonometric data
  • • maintain system integrity against telepathic intrusion
Active beliefs
  • • calculated logic ensures survival and mission success
  • • obedience to the Doctor’s directives is non-negotiable
Character traits
mechanically precise unquestioningly obedient literal in communication sensorially focused
Follow K9's journey

Objects Involved

Significant items in this scene

1
TARDIS Signal Decoding Calculator

The handheld calculator is wedged tightly into Andred’s grip, its faded buttons flashing green as he inputs complex trigonometric sequences. The worn device becomes the interface between human calculation and alien encryption, its humble form now pivotal to Gallifrey’s defense.

Before: Functioning handheld calculator, previously used for routine tasks, …
After: Same calculator, possibly warm from heavy use, still …
Before: Functioning handheld calculator, previously used for routine tasks, now repurposed for emergency computational warfare.
After: Same calculator, possibly warm from heavy use, still in Andred’s possession as he awaits the next sequence.

Location Details

Places and their significance in this event

1
TARDIS Interior

The TARDIS console room serves as an improvised war room under dim emergency lighting. Its hexagonal console pulses with feedback while distant systems react to the Doctor’s unseen manipulations. The curved walls muffle sound, creating an atmosphere of focused intensity where desperation meets ingenuity.

Atmosphere Urgently tense with the low hum of machinery and the sharp rhythm of calculation
Function improvised command center for decoding and defense operations
Symbolism A sanctuary of alien technology repurposed by necessity, where enemies become allies
Access Restricted to immediate participants in the crisis
dim emergency lighting casting long shadows hexaogonal console pulsing with feedback

Narrative Connections

How this event relates to others in the story

No narrative connections mapped yet

This event is currently isolated in the narrative graph

Part of Larger Arcs

K9 and Andred's struggle against the Vardan mind invasion and Gallifrey's compromised security systems