Jack Harkness–Filippo Crosetti collaboration

The collaboration between Jack Harkness and Filippo Crosetti turned a shared environmental alarm into a covert technological programme with potentially catastrophic consequences. Crosetti joined Harkness and Jane Glasson in developing a plan to alter the future through pharmaceuticals; years later, he still partly believed in its purpose, but no longer trusted the course Harkness had chosen.

Recruitment and Shared Purpose

Twelve years before Crosetti’s account of the crisis, Harkness and Jane Glasson brought him into their work and persuaded him that their aims were right. The partnership began in agreement about the danger: without sharp reductions in carbon emissions, Crosetti believed, the world faced severe climate disruption and a sixth mass extinction caused by human activity. He described a limit of eight hundred gigatons of total emissions, with more than five hundred already used and less than three hundred remaining at the current rate. That calculation supplied the moral urgency behind the project, even as it left open whether the chosen response could be justified.

From Pharmaceutical Business to Nanobot Programme

Harkness’s route into pharmaceuticals was strategic. He believed the industry could provide the means to carry out the intervention he and Jane Glasson wanted, and recruited Crosetti to help develop a programme that would distribute nanobots through the company’s products. According to Crosetti, people who had used Harkness Pharmaceuticals’ drugs or cosmetics over the previous five years could have nanobots in their bloodstream; exposure could also occur through crops treated with the company’s pesticides or animals given its antibiotics. The delivery system thus extended far beyond a single treatment or group of consumers.

Crosetti described the nanobots as eventually leaving the body while new ones continued to enter circulation through products made around the world. The programme’s scale was therefore built into ordinary commercial distribution: medicines, cosmetics, and agricultural products carried the technology into everyday life. Their collaboration had moved from a shared argument about planetary risk to an infrastructure capable of reaching millions of people without their awareness.

Cascade and the Wortalleth West System

The programme’s intended activation depended on Cascade, a chain reaction designed to trigger nanobots from outside their hosts. Crosetti attributed the breakthrough to Doctor Tau, whose method could activate one nanobot and then propagate the signal to others within ultrasonic range. Harkness and Crosetti knew how to use the system’s overrides at Wortalleth West and in Locarno; Crosetti said that without those controls, there would be no way to stop the process once it began.

Wortalleth West’s concealed infrastructure gave the plan a physical point of initiation. The house was associated with an unusually large independent power supply: a solar array inland, photovoltaic film on the south-facing walls of the house and garage, and a substantial flow battery. Separately, an assessment of a suspected panic-room barrier noted that a steel door could conceal a two-floor chamber, though its independent cables, pipes, and phone line could not be traced. Crosetti identified a breach of the panic room as the trigger Harkness had arranged: someone would eventually break in, start Cascade, and not understand what they had set in motion. The system’s technical design made the partnership’s intentions inseparable from the building and its hidden mechanisms.

Divergence and Consequence

Crosetti’s allegiance became more conflicted with time. He told Don Challenor that he still partly believed in the programme’s purpose, but called the choice a contest between a wrong answer now and a worse answer later. He had hoped to persuade Jane Glasson to wait, citing the possibility that a shift to renewable energy over the coming decade might avert the need for their intervention. In his account, that hope had failed: Jane Glasson and Harkness remained partners in their resolve, while Crosetti had lost his nerve and no longer held the decision in his hands.

The contrast defines the collaboration at its most consequential point. Harkness’s plan relied on a hidden trigger that could make the activation appear to be the act of intruders, while Crosetti, once persuaded by the project’s purpose, now recognized the scale of the danger and his diminished control over it. Their partnership had not dissolved, but shared conviction had given way to an unequal relationship to the outcome: Harkness and Jane Glasson pressed forward, while Crosetti explained the mechanism and its stakes to others.