Societal Conflict
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The Kraal Invasion

A prolonged conflict centering on the Fourth Doctor and Sarah Jane Smith's resistance against the Kraal's plan to infiltrate Earth with android duplicates, led by Styggron and Marshall Chedaki, with Guy Crayford's collaboration.

32 events across 1 season

Arc Timeline

Season 13

32 events
S13E14 · The Android Invasion Part 2
Styggron grasps the threat from the Doctor

Styggron and Crayford confront the sudden appearance of two unexpected captives in their cell block—a pair of spacefaring intruders identified as the Doctor and his human companion Sarah. Styggron’s procedural …

Start
Sarah is captured after hiding in a tree

The Doctor risks a desperate gamble to divert the pursuing forces, lifting Sarah into a tree as sanctuary while he lures the tracker dogs away. Though she eludes their immediate …

Climax
Sarah endures brain analysis torture

After Harry intercepts her, Sarah awakens strapped to a curved examination bench in Styggron’s lab, her mind already targeted for duplication. The Kraals’ pulsing blue light procedure grinds through her …

Start
Kraal debate over controlling the Doctor

Styggron studies the Doctor’s reaction to the darts board in the fabricated village, interpreting his confusion as both suspicion and uncertainty. Chedaki dismisses the experiment as wasted effort, arguing the …

Start
Kraal leader seizes direct control

Styggron abruptly terminates his reliance on indirect observation of the Doctor and asserts direct command, demanding the presence of Crayford. The move signals a sharp escalation in the Kraal's invasive …

Climax
Styggron demands progress report

Styggron's terse demand for completion exposes the Kraal's brittle invasion timeline. His impatience reveals cracks in the plan while underscoring the high stakes—the Doctor's interference has forced adjustments that risk …

Resolution
Crayford acknowledges timeline failure to Styggron

Crayford reports a deviation in the invasion timeline to Styggron, his words strained by impending failure. His admission carries the weight of a commander forced to confront the erosion of …

Resolution
Styggron declares the Doctor must be destroyed

Styggron and Chedaki assess the captured Doctor’s threat level, reviewing the Tyla’s data on his legacy of opposing conquest across time and space. Recognizing the Doctor’s systemic interference as an …

Resolution
Styggron forces reprocessing of Crayford

Styggron and Chedaki assess the risks of android technology while Crayford arrives to report readiness. Recognizing the android’s potential to be turned against the Kraals if the Doctor interferes, Styggron …

Climax
Doctor uncovers Kraal test of intelligence

The Doctor reunites with Sarah in a village shop after their separate escapes from Kraal androids. Sarah reveals the terrifying ordeal of brain analysis by what she thought was the …

Resolution
Doctor and Sarah flee to TARDIS for warning

The Doctor and Sarah regroup in a village shop after their recent escapes, confirming the Kraal’s plan to replace humans with android duplicates. Recognizing they are being tested, the Doctor …

Resolution
S13E15 · The Android Invasion Part 3
Countdown to annihilation set in motion

Styggron and Chedaki finalize the nine-minute countdown to annihilate both the Doctor and the simulated English village, a precise timetable for their victory over Earth. Sarah overhears the deadline while …

Start
Kraal shockwave devastates village facade

The Doctor and Sarah barely seal the hatchway before the Kraals detonate a shockwave that obliterates the simulated English village outside. The destruction leaves behind only a barren wasteland, graphically …

Start
Crayford orders Doctor and Sarah imprisoned

Crayford seizes control by ordering the Doctor and Sarah incarcerated, framing their capture as a victory for his Kraal masters. The Doctor’s casual inquiry about Styggron exposes his awareness of …

Climax
Deadly trap lures fumble-fingered android guard

The Doctor and Sarah exploit the brig’s controls to rig a lethal counter. Working under the Kraals’ noses, Sarah baits the electrified plate while their android captor Adams is casually …

Resolution
Sarah and the Doctor sabotage Kraal plans

With the mind analyzer seconds from turning the Doctor’s consciousness into stolen data, Sarah escapes the brig using a jury-rigged power cable and matches to create a smoke diversion. She …

Climax
Sarah stops the mind scanner and frees the Doctor

Sarah exploits a momentary lapse in the Kraals' vigilance to escape the brig, using a power cable and short-circuiting an android guard to create a diversion before racing back to …

Resolution
Doctor and Sarah uncover android threat

As the rocket launch approaches, the Doctor and Sarah seek refuge in the hold to escape deadly g-forces. Finding a pod, they open it expectantly only to discover a dormant …

Start
Android awakens before launch

The Doctor and Sarah discover the Kraals' invasion plan is already in motion when they free a dormant android from its pod. Seconds later, Marshal Chedaki's voice counts down the …

Climax
S13E16 · The Android Invasion Part 4
Doctor reveals deadly escape plan

With the android-invaded ship approaching and Earth's Defense Station in imminent danger, the Doctor awakens Sarah from blackout and lays bare a desperate gamble. He proposes they board unshielded cargo …

Start
Doctor exposes Kraal android conspiracy in SDC base

The Doctor’s carefully calibrated plan to expose the Kraal android infiltration reaches its first public confrontation in the SDC scanner room. Faraday and his team anxiously track Crayford’s returning ship …

Climax
Android assault forces Doctor’s flight

The SDC scanner room team monitors the approaching XK-5 ship and a parallel meteorite-like cluster slowing unnaturally over Earth. As Matthews warns of their trajectory toward Oxfordshire, the Doctor senses …

Resolution
Doctor realizes Sarah is missing upon landing

The Doctor’s pod touches down on Earth, but instead of relief his first reaction is dread when he sees Sarah’s pod is empty. He calls out her name, his voice …

Start
Sarah confronts her android double

Sarah stumbles upon the TARDIS in Devessham Wood, relieved to find the Doctor waiting with a chilling revelation—someone has replicated both of them. Before she can react, the android Doctor’s …

Climax
Sarah yields and boards the TARDIS

The tension of Sarah’s resistance dissolves in an exchange of dark humor and reluctant admission about the Doctor’s deception. Her initial outrage over the android invasion’s flawed mimicry gives way …

Resolution