Fabula
Season 4 · Episode 23
S4E23
Claustrophobic
Written by Kit Pedler
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The Moonbase Part 1

When the TARDIS lands on the moon in 2070, the Doctor and his companions stumble upon a weather control center, where a mysterious virus is infecting the crew and threatening Earth's weather patterns.

The Doctor, along with his companions Polly, Ben, and Jamie, find themselves on the moon in the year 2070 after an unstable TARDIS journey. They quickly discover a moonbase that functions as a weather control center, responsible for managing Earth's climate through a powerful device called the Gravitron. The base is thrown into chaos as a mysterious illness infects members of the crew, causing them to collapse with strange black lines appearing on their faces.

The base commander, Hobson, struggles to maintain control as the situation deteriorates. The Doctor offers his assistance, but Hobson is hesitant, especially as the base is put under quarantine by Earth authorities due to the unknown nature of the virus. Amidst the escalating crisis, Jamie is knocked unconscious and taken inside the base for medical attention which gives the Doctor and his companions a chance to enter the base.

As the Doctor, Polly, and Ben explore the moonbase, they witness the effects of the illness and discover that the station doctor also has fallen victim to the virus. The Time Lord notices certain inconsistencies in the symptoms that suggest the illness isn't what it seems. Ben is tasked with observing the control room, while the Doctor investigates the medical unit. In the food store, another crew member disappears after an odd meeting with Ben, heightening the sense of paranoia and suspicion.

The situation worsens as the sick grow more delirious; one mutters about a "silver hand", just the latest frightening symptom. As the Doctor reports an ominous death, Hobson is desperate to conceal growing evidence of base infection and keep the crisis contained. The Doctor and his companions find themselves caught in a web of conspiracy, as they struggle to uncover the truth behind the mysterious illness that sweeps through the moonbase, threatening not only the crew but also the stability of Earth's weather.


Events in This Episode

The narrative beats that drive the story

22
Act 1

The Doctor, Polly, Ben, and Jamie endure a tumultuous TARDIS journey, eventually landing on what Ben identifies as the Moon in 2070. Despite the Doctor's initial reluctance, the companions insist on exploring the lunar surface. Their excursion quickly turns perilous when Jamie, experimenting with the low gravity, falls into a crater and is rendered unconscious. This incident leads them to discover a large, domed structure – a sophisticated weather control center housing the Gravitron, a device managing Earth's climate. As two spacesuited figures retrieve Jamie and take him inside, the Doctor, Ben, and Polly follow, gaining entry to the mysterious base. Inside, they immediately encounter a crisis: a crew member collapses, displaying strange black lines on his face, and an alarm blares. Hobson, the base commander, and his second-in-command, Benoit, struggle to manage what they identify as a rapidly spreading 'mystery virus' that has already incapacitated the station's doctor, Evans. Hobson interrogates the newcomers, initially suspicious of their unexpected arrival. Polly secures permission to visit Jamie in the medical unit. The Doctor, ever observant, quickly deduces the Gravitron's function and its role in their bumpy landing. The situation escalates dramatically when another crew member collapses. Earth Control intervenes, noting a hurricane off course and demanding blood samples, ultimately placing the entire Moonbase under quarantine. This directive effectively traps the Doctor and his companions, forcing their involvement in the unfolding disaster. The Doctor, recognizing the severity of the situation and the lack of medical expertise, offers his assistance, marking his transition from reluctant visitor to active participant in the base's desperate struggle against the unknown illness. The act concludes with the Doctor, Ben, and Bob heading to the sickbay, establishing the Doctor's new role and deepening the mystery surrounding the base's predicament.

Act 2

With the Moonbase under quarantine, the Doctor, Ben, and Polly are now fully immersed in the escalating crisis. In the sickbay, Polly monitors Jamie, who, though concussed, deliriously mutters about 'The Piper,' a clan legend of impending death. The Doctor, while dismissing the supernatural element, acknowledges its psychological impact on Jamie. He then examines Doctor Evans, the station's own physician, who is gravely ill with the same mysterious affliction. The Doctor immediately identifies inconsistencies in the symptoms, concluding that the illness does not behave like a natural disease, hinting at an artificial or external cause. He dispatches Ben to the control room to observe, emphasizing the gravity of the situation with a stark warning that 'something very wrong' is occurring. In the control room, Ben attempts to assist, but Hobson's stress and paranoia are palpable, exacerbated by unexplained drops in air pressure. Benoit assigns Ben to the food store to help Ralph. There, an unsettling incident unfolds: Ralph, complaining about 'rats,' is suddenly attacked by a 'huge figure' and dragged away, leaving Ben bewildered and attributing his disappearance to him having 'scarpered.' Back in the sickbay, the Doctor continues his investigation, discovering a piece of 'silver paper' and experiencing a dimming of lights due to the base's artificial day-night cycle. The situation intensifies when Doctor Evans screams in delirium, his final words chillingly referencing 'The silver hand' before he succumbs to the illness. The Doctor resolves to report this ominous death and the cryptic clue to Hobson. When Ben reports Ralph's disappearance and the Doctor reports Evans' death, Hobson, desperate to prevent further panic and external scrutiny, vehemently refuses to report the death to Earth Control. This decision reveals Hobson's intent to conceal the true extent of the crisis, setting him at odds with the Doctor and deepening the conspiracy surrounding the Moonbase's mysterious affliction. The act concludes with Hobson's defiant cover-up, solidifying the internal conflict and raising the stakes for the Doctor's investigation.