S4E7
Tragic
Written by Gerry Davis
View Graph

The Tenth Planet Part 3

As Earth faces an energy-draining planet and a Cyberman invasion, a weakened Doctor, along with his companions Ben and Polly, must thwart a power-hungry General's reckless plan to destroy the planet Mondas with a doomsday weapon, risking Earth's survival.

The episode opens with the discovery of spaceships near Earth, signaling the imminent arrival of the Cybermen. General Cutler, stationed at a space defense base, is determined to protect Earth, while the Doctor suddenly collapses, leaving his companions Ben and Polly to seek help. Communication with Zeus 5 reveals that Lieutenant Cutler, the General's son, is experiencing power loss in orbit due to the arrival of a new planet, Mondas, which is draining Earth's energy.

General Cutler, concerned for his son's safety and convinced that Mondas poses an existential threat, resolves to destroy it using the Zee-bomb, a doomsday weapon. Despite opposition from Doctor Barclay and the lack of authorization from Geneva, Cutler orders preparations for the launch. Ben and Polly, realizing the catastrophic consequences of Cutler's plan with the help of the incapacitated Doctor, try to find a way to stop him, fearing the radiation effects on Earth and the destruction of the space capsule carrying Lieutenant Cutler. Meanwhile, Cutler seeks permission from Secretary Wigner to use the Zee-bomb, but is denied due to the potential disastrous effects. However, Cutler exploits a loophole by interpreting the authorization to take any action against the Cybermen as justification for using the bomb.

As the Cybermen approach the base for an attack, Cutler prepares to launch the Zee-bomb. Ben and Polly, with Doctor Barclay's reluctant assistance, devise a plan to sabotage the rocket. Ben sneaks through a ventilation shaft into the rocket silo to disconnect the fuel pump, while Polly tries to persuade Barclay. Meanwhile, Cutler's forces engage the Cybermen in a fierce battle at the South Pole.

As Ben is working on the rocket, Cutler discovers the sabotage attempt and captures him and Barclay forcing him to continue with the launch preparations. Despite the dangers and lack of guarantees, Cutler is determined to proceed, placing his son in mortal danger as a result. The episode concludes with the countdown underway and the fate of Earth and Mondas hanging in the balance, as well as the life of the General's son. Ben's and Polly's actions leading to an uncertain outcome to be determined in the next episode.


Events in This Episode

The narrative beats that drive the story

23
Act 1

The narrative opens with General Cutler receiving reports of incoming Cybermen spaceships, coinciding with the Doctor's sudden collapse, leaving companions Ben and Polly to tend to him. Cutler, focused on the immediate threat, dismisses the Doctor's condition. Communication with his son, Terry, aboard Zeus 5, reveals power loss in orbit, directly linked to the new planet Mondas, which drains Earth's energy. This discovery intensifies Cutler's resolve. Convinced Mondas is an existential threat and driven by concern for his son's safety, Cutler declares his intention to destroy the planet using the Zee-bomb, a doomsday weapon. Doctor Barclay and Dyson raise concerns about the catastrophic radiation effects on Earth and the lack of proper authorization from Geneva. Cutler, however, remains unyielding, asserting that 'impossible is not in my vocabulary.' He contacts Secretary Wigner for approval, but Wigner denies permission, citing the potential for disastrous environmental consequences and the need for scientific consultation. Undeterred, Cutler exploits a loophole, interpreting Wigner's general authorization to take 'any action necessary against the Cybermen' as justification for deploying the Zee-bomb against Mondas. When Ben and Polly challenge his interpretation and the extreme risk, Cutler orders them locked up with the incapacitated Doctor, asserting his command and dismissing their concerns as interference. This act establishes Cutler's ruthless determination and the immediate threat of his plan.

Act 2

With Ben and Polly confined, Ben reveals the Doctor's earlier insight: Mondas is not just a threat to Earth but is itself in grave danger, destined to burn out from absorbing too much energy. He argues that waiting is the safest course, as Mondas would eventually self-destruct, eliminating the threat without catastrophic risk to Earth. Cutler vehemently rejects this strategy, viewing it as passive and dangerous, preferring to 'accelerate the process' and destroy Mondas sooner. Doctor Barclay reiterates the severe risks of a nuclear explosion on Mondas, warning of a 'terrific blast of radiation' that could devastate life on Earth and certainly destroy the space capsule carrying Cutler's son. Despite these dire predictions and the lack of 'guarantees of success,' Cutler remains resolute, ordering Barclay to program the bomb to hit Mondas when his son is on the far side of Earth, a desperate attempt to mitigate risk. As Cybermen approach the base, Polly, realizing the urgency, appeals to Barclay. She challenges his passivity, questioning how he can allow such a destructive plan to proceed. Polly proposes a plan to feign compliance while secretly sabotaging the rocket. Barclay, though initially hesitant and fearful of Cutler's ruthlessness, eventually agrees to help. He reveals a ventilation shaft leading directly into the rocket silo, a path Ben could use. They devise a precise method to disable the fuel pump, ensuring the rocket fails to launch, setting the stage for their desperate act of sabotage.

Act 3

As the Cybermen initiate their attack on the South Pole, engaging Cutler's forces in a fierce battle, Ben begins his perilous journey through the ventilation shaft towards the rocket silo. Following Barclay's instructions, he navigates the cramped space, observing a scientist inside the silo. Polly, meanwhile, orchestrates a distraction, causing the scientist to leave the silo, clearing the way for Ben. Ben successfully unfastens the grill and enters the silo, immediately locating the 'Plug Servo Leads' panel. He begins the delicate task of unscrewing the panel, preparing to snip a pin from one of the fuel pump plugs as instructed. Simultaneously, Cutler, monitoring the Cybermen engagement, grows suspicious when he cannot locate Doctor Barclay. He questions Dyson, who suggests Barclay might be at the rocket silo. Cutler confronts Barclay outside the silo, but before Barclay can offer a plausible explanation, Cutler enters the silo. There, he discovers Ben halfway inside the rocket's mechanism, actively engaged in sabotage. Cutler violently pulls Ben out, who falls backwards over a railing. Undeterred by the sabotage and the immediate danger to his son, Cutler orders Ben taken to the tracking room and assigns a technician to check the rocket for damage. He then forces Barclay to accompany him, declaring that they will discuss Barclay's actions only 'after that rocket's gone.' The episode concludes with Cutler's unwavering determination to proceed with the launch, despite the sabotage attempt, the ongoing Cybermen attack, and the profound uncertainty of its consequences for Earth, Mondas, and his son. The countdown continues, leaving the fate of all hanging precariously in the balance.