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Production Code SS
First Transmitted:
Cast
Crew
The explosion of the mercury fluid links forces the Second Doctor and Jamie McCrimmon to evacuate the TARDIS to avoid mercury fumes and, until the mercury can be replaced, the craft is marooned. They find themselves on a space vessel deserted apart from a Servo-Robot. The robot detects the intruders and in response redirects the rocket from aimless wandering, sending it on a course, and the shock of change causes the Doctor to hit his head, briefly concussing him. The robot also releases a group of egg-shaped white pods into space, and the mysterious things direct themselves toward a nearby spaceship shaped like a giant wheel, attaching themselves to its exterior by a seeming act of will. When the robot becomes aggressive, Jamie succeeds in destroying it, but the Doctor’s condition worsens and he collapses. The Wheel is an Earth space station observing phenomena in deep space and is staffed with a small international crew. Crewmembers are concerned by the sudden drops in pressure which, unbeknownst to them, coincide with the pods attaching themselves to the exterior of the Wheel. Controller Jarvis Bennett is also worried that the Silver Carrier, a missing supply vessel eighty million miles off course, has suddenly turned up nearby and is not responding to radio contact. He decides to destroy it with the Wheel’s powerful X-Ray laser and is only prevented from doing so when they hear a deafening burst of noise from the vessel. Jamie has managed to alert them to his presence aboard the Carrier and in a short time he and the unconscious Doctor are both rescued and taken aboard the Wheel. While the resident medic, Doctor Gemma Corwyn, sees to the Doctor, Jamie is given a guided tour by the sparky young para-psychology librarian, Zoe Herriot. Bennett remains suspicious of the new arrivals, fearing they could be saboteurs opposed to the space programme. He decides to use the X-Ray Laser on the Carrier now that the two refugees have been rescued, little realising the TARDIS is still on board. Jamie intervenes to sabotage the laser, which only further infuriates Bennett, especially as the potential meteor shower heading for the Wheel – and they now have no way to repel it. When the Doctor recovers in the sickbay he does not approve of this action. He also remains groggy and unclear, but convinced a major danger lurked on the Silver Carrier. He calculates that the ship did not drift to their sector but was deliberately piloted there. The Wheel’s crew, however, are more concerned with the impending meteor shower. On board the Carrier, meanwhile, two large pods have split open to reveal two Cybermen inside. The small pods they sent to the Wheel contained Cybermats and these have been set to work in consuming bernalium rods in the Wheel’s stores. The bernalium is essential to power the X-Ray Laser. The Cybermen have deliberately engineered the star in Messier 13 to go nova, thus forcing the Wheel crew to look for their bernalium and find it missing, When this happens the Cybermen are sure the crewmen will instead come to the Silver Carrier for the bernalium, which can then be transported into the Wheel – with a surprise inside. An engineer called Bill Duggan indeed has noted the depleted stocks and the presence of the Cybermats. His slowness in reacting allows another crewman, Kemel Rudkin, to fall victim to the Cybermats. Jarvis Bennett overreacts with panic to this state of affairs, briefly stripping Duggan of his position and imposing tighter controls. The Doctor has a more practical solution – he uses the X-Ray machine to scan inside a pod that has been found but cannot be opened. The Cybermat within is easy for him to identify, but Bennett does not accept the danger. Indeed, medic Gemma Corwyn, who has formed an alliance with the Doctor, fears for Bennett’s mental state as he seems unable to deal with escalating events. Over time his behaviour seems to be becoming more and more bizarre and detached from reality. He has sent two crewmen to the Silver Carrier, Laleham and Vallance, and the two are taken over by the Cybermen and used to prepare the bernalium crates for the Wheel with the two Cybermen hidden inside. This ruse works and the crates are soon aboard the Wheel, with Duggan and his colleague Leo Ryan glad to have access to a new power supply for the X-Ray Laser, which they are slowly managing to repair. An engineer called Chang is killed by the emerging Cybermen when he is sent to fetch the new bernalium supply. They dispose of his body in the waste incinerator. Laleham and Vallance arrive at the Laser with the supply of bernalium for Duggan, who soon falls victim to the same mind control process and becomes the third agent of the Cybermen on the Wheel. He is sent to destroy the communications unit and manages to do so before being gunned down. The Doctor has meanwhile deduced that the fortuitous supply of bernalium has a deeper significance. He has also worked out the late Duggan was under mind control and instructs Dr Corwyn to use a basic transistor system attached to each of the crewmen as a means of repelling this technique. A further step forward is taken when the crew use a sonic wave to disable and kill the Cybermats on the Wheel, but it is also clear to the Cybermen are at large and proceeding with their plans. The death of Laleham is no obstacle as another engineer, Flannigan, is found to replace him. The Cybermen have invested time in repairing the X-Ray Laser, evidently needing it ready for use. Thus when the meteorites are finally due to hit they can be deflected and obliterated. The Cybermen need the Wheel intact as they are planning to use it as a launching point for an invasion of Earth, desperate for the planet’s mineral wealth. The Wheel's radio beam will enable them to do this. The human crew have managed to fully repair the X-Ray Laser and use it to defend the are one by one picked off by the Cybermen or the agents – Gemma Corwyn dies trying to prevent the Cybermen damaging the oxygen supply on the Wheel; and, shocked back to consciousness by her death, the insane Jarvis Bennett is mown down when he seeks revenge. Leo Ryan assumes control as the Doctor warns there is a vast Cyberman spacecraft heading for the Wheel. The Doctor has decided he needs the time vector generator which he removed from the TARDIS. Jamie and Zoe are chosen for a space-walk to the Silver Carrier and return with the prize. Flannigan tries to overpower them when they get back to the Wheel, but he in turn is overwhelmed by Leo and Enrico Casali, the communications officer, and his conditioning is broken. The Doctor also manages a triumph, electocuting one of the Cybermen and confirming to himself the full nature of their plans. He uses the time vector generator to boost the power of the X-Ray Laser and this succeeds in destroying the advancing Cybership. A troop of Cybermen space-walking to the Wheel are also dispensed with, while Jamie and Flannigan free Vallance and destroy the remaining Cyberman inside the Wheel. With the invasion repelled the Doctor and Jamie return to the Silver Carrier with the mercury they need to repair the TARDIS. They are accompanied by Zoe, who quietly stows away as the time vessel departs. She is determined to stay and so, to warn her of the dangers ahead, the Doctor uses a mental device to project images from his mind which tell her of his and Jamie's encounter with the Daleks in their search for the Dalek Factor...
Analysis by Cuisle Another set of companions get to tackle Cybermen with The Doctor.
Patrick Troughton’s incarnation was especially plagued by them.
More than any other Doctor. This is the fourth Cyberman story, and
the third for Patrick Troughton to deal with. The basic premise is
not dissimilar to the previous stories. The TARDIS crew arrive on
a space station just as the Cybermen send an advanced guard called
cybermats – sort of foot long metal slugs. Incidentally, this story is followed up on TV by a reshowing of the story “Evil of the Daleks” with the last scene of this story being The Doctor showing the events of that story to Zoe to warn her what to expect if she comes with him. A rather odd idea. And why they needed to fill the schedule with a repeat I am not sure. Zoe is the only crew member ever to get a warning of what life with The Doctor would be like.
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