S7E24
Tragic
Written by Don Houghton
View Graph

Inferno Part 6

When a dangerous experiment pierces into an alternate Earth, a stranded Doctor must repair the TARDIS using a nuclear reactor before destructive forces consume both worlds, while facing mutated beings and a desperate military leader.

In "Inferno - Episode Six," the Doctor finds himself trapped in a parallel dimension where a scientific project mirroring his own world's is on the brink of disaster. Professor Stahlman's ambitious drilling operation has unleashed a deadly plague, transforming people into grotesque, fire-needing creatures dubbed "Greens." As the situation deteriorates, the Doctor, alongside companions from this alternate world, seeks a way to restore power to his TARDIS and escape back to his own reality.

The episode opens with the Doctor, Greg Sutton, and others barricaded in an office, fending off the advancing Greens. The Doctor proposes a risky plan: connecting the TARDIS console to the facility's nuclear reactor to generate the necessary power for his return. Despite skepticism and the imminent threat, the group ventures into Central Control, utilizing fire extinguishers and coolant hoses as makeshift weapons against the mutated beings. Stahlman, also affected, becomes a relentless pursuer.

Amidst the chaos, alliances and tensions rise. Brigade Leader Stewart, driven by a ruthless survival instinct, clashes with Doctor Williams and others who question his methods. The Doctor navigates the dual challenges of repairing the master switch in Central Control, with Greg loyally assisting him, and the escalating geological instability caused by the drilling. Meanwhile, in the Doctor's original reality, Liz Shaw investigates his disappearance, encountering Sutton, who voices suspicions about the circumstances. Brigadier Lethbridge-Stewart confronts Professor Stahlman about Sir Keith Gold's disappearance, highlighting the growing unease surrounding the Inferno project.

As the alternate Earth crumbles, the Doctor and his allies race against time. They reach the Nuclear Reactor Switch Room, where Williams attempts to reroute the electrical system. Back in the Doctor's lab, he works feverishly to connect the power cable to the TARDIS console. Despite Williams' efforts, power cannot be restored creating even more panic.

Ultimately, Stewart's paranoia leads to a confrontation with the others, revealing his plan to commandeer the TARDIS for himself. The episode crescendos as the team returns to the Doctor's workshop, the reactor grows more unstable, and fractures tear apart the landscape. Williams finally manages to make the connection in another desperate attempt. With time running out, the Doctor prepares to activate the TARDIS, hoping to escape the inferno and prevent a similar catastrophe in his own world, while leaving the fate of the alternate Earth uncertain.


Events in This Episode

The narrative beats that drive the story

24
Act 1

Facing imminent danger from mutated 'Greens' in a collapsing alternate reality, the Doctor devises a perilous plan to power his TARDIS by connecting it to the facility's nuclear reactor. He, Greg Sutton, and others barricade themselves in an office, using fire extinguishers to repel the creatures. The Doctor outlines the complex process: resetting a master switch in Central Control, then reaching the main switch room. Greg improvises a powerful coolant hose, providing a critical temporary weapon. The group fights their way into Central Control, where they encounter a mutated Stahlman, whom Stewart temporarily incapacitates. Greg stays behind with the Doctor to repair the master switch, while the others retreat. Concurrently, in the Doctor's original reality, Liz Shaw investigates his disappearance, encountering a suspicious Sutton who notes Sir Keith Gold's vanishing act. Brigadier Lethbridge-Stewart confronts Professor Stahlman about Gold, but Stahlman dismisses the concerns and defiantly refuses to halt the dangerous 'Penetration Zero' project, unknowingly mirroring the catastrophe unfolding in the alternate dimension. This act establishes the immediate threat, the Doctor's high-stakes solution, and foreshadows the parallel disaster.

Act 2

In the alternate reality, the Doctor and Greg successfully repair the master switch in Central Control, continuing their race against time as the environment grows increasingly unstable. They regroup with Shaw, Williams, and Stewart, then drive to the Nuclear Reactor Switch Room. The Doctor and Greg begin connecting the TARDIS console, while Doctor Williams undertakes the complex task of re-routing the electrical system to boost power. Earthquakes intensify, signaling the escalating geological instability caused by the drilling. As Greens continue to emerge, Brigade Leader Stewart's true intentions surface. He pressures Williams relentlessly, revealing his ruthless plan to commandeer the TARDIS for himself and abandon the others, clashing with Shaw who still trusts the Doctor. Back in the Doctor's workshop, Greg connects the heavy-duty cable to the TARDIS, expressing concerns about the immense power surge. Williams, under immense pressure, attempts to activate the power, but the system fails to respond, indicating a fault and creating a significant setback. The alternate Earth continues to crumble around them, with the drill shaft splitting open.

Act 3

Following the initial power failure, despair grips the group. Stewart, his authority crumbling, descends into a fit of hysteria, openly clashing with Greg Sutton. Their confrontation escalates into a physical fight, with Greg easily overpowering the now-disarmed Stewart. Amidst the chaos, Shaw reveals that Doctor Williams, against all odds, has returned alone to the Nuclear Reactor Switch Room for another attempt at restoring power. Greg, concerned for her safety, rushes after her, instructing the Doctor to remain at the TARDIS console in case Williams succeeds. Greg finds Williams working frantically at the control panel, with a mutated Stahlman lying seemingly incapacitated nearby. Despite the immense danger and Greg's protests, Williams insists on finishing the rewiring. As Stahlman revives, Greg fends him off with an extinguisher, allowing Williams the crucial moments she needs. Finally, Williams completes the connection, and four red lights blink, signaling that power is successfully flowing to the TARDIS. With the immediate objective achieved, Greg urges Williams to return to the workshop, leaving the Doctor poised to activate his escape.