Companions disrupt Cybermen with solvent attack

The Cybermen's Conversion Headpieces are forcibly removed from the skulls of Evans, Franz, Ralph, and Jules by Ben, Jamie, and Polly. These devices, which clamped onto the men's bones to override their will and erase their individuality, are pried off in a swift and decisive action. The removal severs the Cybermen's psychic control, causing the men to collapse unconscious as their autonomy is restored. The headpieces, now detached, lie inert on the floor, their purpose fulfilled and their victims freed.

The Cybermen's Chest Units are the primary targets of the 'Polly cocktail' ambush. Ben, Jamie, and Polly spray the solvent mixture directly at these vulnerable plastic components, causing them to bubble, corrode, and dissolve instantly. The chest units, which house the Cybermen's critical circuitry, fail catastrophically under the chemical assault, leading to the immediate collapse of Cyberman 1 and Cyberman 2. This direct attack on their mechanical vulnerability proves decisive in disrupting their control over the moonbase.

The Gravitron, the moonbase's central gravity-control device, is a critical focal point in this event. While the Doctor and Hobson work urgently to reset the Gravitron to prevent catastrophic weather disruptions on Earth, the device remains vulnerable to Cyberman manipulation. Its stabilization is prioritized over immediate medical aid for the freed men, underscoring its role as the moonbase's most critical system and the Cybermen's primary target for global destruction.

The 'Polly cocktail'—a volatile solvent mixture of benzene, ether, alcohol, acetone, and epoxy-propane—is the weapon that turns the tide of the battle. Ben and Polly refilled a fire extinguisher bottle with this mixture, creating a spray weapon specifically designed to target the Cybermen's plastic chest units. During the ambush, they use the bottle to spray the solvent directly at the Cybermen, causing their chest units to bubble, corrode, and dissolve. This improvised weapon proves critical in disabling the Cybermen and freeing the mind-controlled humans.

The Gravitron Chamber is the secondary battleground where the Doctor and companions rush to free the mind-controlled humans. This sealed chamber houses the Gravitron, the moonbase's critical gravity-control device, and is a tight, confined space filled with flickering systems and blaring alarms. The Doctor and companions remove the metal helmets from Evans, Franz, Ralph, and Jules, freeing them from Cyberman control. The chamber's atmosphere is one of urgency and relief, as the men collapse unconscious but are finally liberated from their psychic imprisonment.

The Control Room serves as the primary battleground for the ambush on the Cybermen. Ben, Jamie, and Polly burst into this nerve center of the moonbase, where Cyberman 1 and Cyberman 2 are overseeing the mind-controlled humans. The room is tense and chaotic as the 'Polly cocktail' is sprayed, causing the Cybermen to collapse. The Control Room's consoles and equipment hum with activity, reflecting the urgency of the situation. It is a space of high stakes, where the fate of the moonbase and Earth hangs in the balance.

The Medical Unit is mentioned as the destination for the freed men, though it is not directly depicted in this event. Hobson orders the crew to move Evans, Franz, Ralph, and Jules to the medical unit for immediate care after they collapse unconscious. This location symbolizes safety, recovery, and the human effort to heal and restore autonomy. While not physically present in this event, its role as a refuge and healing space is critical to the narrative.

The Cybermen, as an organization, are directly targeted and disrupted in this event. Their collective control over the moonbase is challenged by the ambush led by Ben, Jamie, and Polly, who use the 'Polly cocktail' to dissolve the Cybermen's chest units. This attack causes Cyberman 1 and Cyberman 2 to collapse, severely weakening their operational capacity. The Cybermen's reliance on mechanical systems and their dismissal of human creativity prove to be their downfall in this critical moment.

The Moonbase Crew, represented by Hobson and the freed men, plays a critical role in this event. Hobson prioritizes the stabilization of the Gravitron over immediate medical aid, demonstrating his leadership and strategic focus. The freed men—Evans, Franz, Ralph, and Jules—are liberated from Cyberman control, collapsing unconscious but with their autonomy restored. Their recovery and the crew's efforts to move them to the medical unit highlight the human resilience and solidarity that counter the Cybermen's invasion.