S13E2
Paranoid
Written by Robert Banks Stewart
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Terror of the Zygons Part 2

When a mysterious alien creature begins attacking oil rigs, the Doctor must stop the Zygons, a shape-shifting alien race, from taking over Earth.

The Doctor and his companions, Sarah and Harry, investigate a series of mysterious attacks on oil rigs, only to discover that the culprit is a monstrous creature linked to the Zygons, an alien race that can shape-shift into human form. The Zygons, led by the ruthless Broton, plan to use the creature, known as the Skarasen, to conquer Earth. As the Doctor delves deeper into the mystery, he uncovers the Zygons' plan to use human body prints to create replicas of humans, allowing them to infiltrate and control human society. With the help of Brigadier Alistair Gordon Lethbridge-Stewart and his UNIT team, the Doctor must thwart the Zygons' plans and prevent a catastrophic takeover. Along the way, he uses his wit and sonic screwdriver to outsmart the Zygons and their minions, ultimately leading to a showdown with the Skarasen and the Zygons' leader, Broton.


Events in This Episode

The narrative beats that drive the story

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Act 1

The narrative opens with an immediate crisis as Sarah's scream echoes over the telephone, prompting the Doctor's urgent response. He discovers Sarah trapped in a decompression chamber, from which he skillfully rescues her using a hypnotic technique. Simultaneously, Harry is abducted and brought aboard a Zygon spaceship, where Broton, the Zygon War Lord, reveals their species' dire situation: their home world destroyed, they intend to conquer Earth. Broton showcases the Skarasen, a monstrous, armored cyborg creature, as their ultimate weapon and demonstrates the Zygons' chilling ability to perfectly replicate human forms, exemplified by the transformation into the 'Caber.' Back on Earth, UNIT forces are incapacitated by a nerve gas attack, a diversion allowing the Skarasen to attack and kill a lone soldier. The Doctor and Sarah return to the gassed Fox Inn, confirming the Zygons' presence and the immediate danger they pose. This initial act establishes the Zygons as a formidable, technologically advanced, and ruthless enemy, capable of both overt aggression and insidious infiltration. The Doctor grasps the gravity of the situation, understanding that Earth faces a systematic takeover, not merely a series of isolated attacks. The act concludes with the full revelation of the Zygon threat, setting the stage for the escalating conflict.

Act 2

Following the initial Zygon revelations, the conflict intensifies as Broton, monitoring the Doctor's movements, realizes his survival and possession of the trilanic activator. He orders Harry prepared for a 'body print,' a process that culminates in a Zygon replica of Harry, named Murdlar, infiltrating the Fox Inn. This Zygon-Harry attempts to steal the crucial signalling device, but Sarah, sensing something amiss, confronts him. The ensuing chase leads to a barn, where Zygon-Harry attacks Sarah with a pitchfork. Sarah's defense causes him to fall, revealing his true Zygon form before his body undergoes molecular dispersal, preventing its capture by UNIT soldiers. This incident unequivocally confirms the Zygons' infiltration capabilities, forcing the Doctor and Brigadier to acknowledge the possibility of a spy within their ranks or, more likely, advanced electronic surveillance. The Doctor and Sarah return the signalling device, now understanding its dual nature as an artifact and an organic component. Broton, frustrated by the Doctor's resilience and the failure of the infiltration, escalates his strategy, commanding the Skarasen to launch a direct attack on the village. This pivotal act shifts the narrative from discovery to a direct, internal threat, highlighting the Zygons' cunning and the Doctor's growing understanding of their methods.

Act 3

The final act of this segment commences with the immediate threat of the Skarasen's attack on the village. Sarah observes the Zygon signalling device moving autonomously, confirming the creature's imminent arrival. The Doctor identifies the device as both artifact and organic, confirming its role in summoning the Skarasen. Recognizing the inadequacy of conventional weaponry against such a formidable foe, the Doctor devises a daring plan: he will use the signalling device to draw the Skarasen away from the vulnerable village, buying time for UNIT to locate the Zygon base. Despite Sarah's concerns about the inherent risks, the Doctor, confident in his agility, drives off in a UNIT Land Rover. The Skarasen pursues him across Tullock Moor, and during the chase, the signalling device adheres inexplicably to his hand. Meanwhile, the Brigadier and his UNIT team, utilizing the active signal, successfully triangulate its origin. Their calculations pinpoint the Zygon base to Loch Ness, providing the crucial intelligence needed to counter the alien threat. This act culminates in a perilous direct confrontation for the Doctor and the strategic breakthrough of locating the enemy's hidden headquarters, setting the stage for the ultimate showdown.