The Kraal Android Invasion
The Kraals, a reptilian alien race, deploy android duplicates of key figures, including a replica of Sarah Jane Smith, to infiltrate and destabilize human society. The Doctor struggles to uncover the conspiracy and stop the systematic infiltration. The plan escalates into a full-scale invasion attempt, with the Kraal leadership debating methods and exploiting Crayford's betrayal. The Doctor must navigate hostile mechanized forces and the ethical implications of using duplicates as weapons.
Involved Characters
- The Fourth Doctor
- Sarah Jane Smith
- Harry Sullivan
- Guy Crayford
- Styggron
- Broton
- Colonel Faraday
- Kraal Military Soldiers
- Marshall Chedaki
- UNIT Android Soldier
- Grierson
- Adams
- Pursuers
- UNIT Android Corporal (Quarry Enforcer)
- Doctor (Android Duplicate)
- Kraal Infiltration Androids (Latent & Active)
- Kraal Android Duplicate (English Village)
- Kraal Android Duplicate of Sarah Jane Smith
Arc Timeline
Season 13
35 eventsThe Doctor stands unharmed among the moors despite the Skarasen’s cyborg nature nearly overwhelming him. Brigadier Lethbridge-Stewart and Sarah Jane Smith arrive in their vehicle, drawn by the investigation’s signs …
Sarah and Harry stumble upon Caber and Lamont as the two disguised aristocrats reveal their intention to abandon their human disguises. The exchange exposes their reluctance to remain in borrowed …
Sarah notices the aliens departing the spaceship and seizes the moment to extract Harry quietly. Herself a fugitive in the alien vessel, she recognizes the transient advantage and moves urgently …
The TARDIS lands in Tubney Wood where the Doctor and Sarah Jane investigate environmental anomalies and encounter a trance-like Corporal walking with unnatural movements. The Doctor detects an energy source …
Sarah flees the android pursuers through dense woodland and nearly plunges off a steep cliff. Cornered and sliding toward the brink, she barely catches hold of the ledge. The Doctor …
The Doctor infiltrates Crayford's office to investigate the energy source but immediately faces suspicion. When Crayford discovers him reading classified materials and wielding a map linked to the Brigadier's office, …
Cornered by Crayford in the Brigadier's office with a gun trained on him the Doctor refuses to submit to detention. When Crayford demands identity verification and his superior is found …
The Doctor flees soldiers through a loft hatch and makes it to the SDC roof where he is met by two white-suited figures pointing loaded weaponry. His sarcastic inquiry about …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
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 …
Crayford reveals his complicity in the Kraals' invasion plot, explaining how he masterminded a false return to Earth to lull humanity into a false sense of security. As the Doctor …
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 …
Captured by the Kraals, the Doctor is fastened to Styggron’s mind analyzer as the alien commander reveals the full scale of the invasion: android sleeper agents programmed to deploy a …
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 …
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 …
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 …
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 …
The Doctor and Sarah’s hopes hinge on the Doctor’s split-second improvisation as their ship’s tracking systems betray them. In the SDC scanner room, Faraday and his team celebrate the imminent …
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 …
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 …
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 …
The Doctor and Sarah rush toward warning Earth as their tracked ship nears landing. The Doctor warns Sarah about an android replica of her, and moments later one appears and …
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 …
Sarah unties Faraday and Harry mid-rescue when Styggron bursts in, revealing his plan to use Sarah as his virus test subject. Crayford’s sudden betrayal of Styggron triggers a violent struggle …
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 …