Summary from [b]http://en.wikipedia.org/wiki/Nightmare_in_Silver[/b]:
[i]The Doctor takes Clara and the two children, Angie and Artie, to whom she is nanny, to an extraterrestrial theme park. However, they find the park abandoned and closed down, and under military occupation. The Doctor convinces the troops and their Captain stationed there that he is an official looking for their missing Emperor and they find Webley, the owner of the theme park, who takes them on a tour. Webley then shows them several deactivated Cybermen, explaining that the Cybermen race was defeated and exterminated a thousand years ago. They are harmless museum pieces while one is converted into a chess-playing machine operated by Porridge, a chess champion with dwarfism. After having fun playing at some of the park’s attractions, Clara is ready to take Angie and Artie back home. However, the Doctor decides to stay, becoming suspicious of strange bugs infesting the park. The bugs are revealed to be cybermites, which reactivate the Cybermen in the museum. The Cybermen then abduct Webley, Angie, and Artie.
The Captain and her platoon are shocked that there are still active Cybermen, and admit that they are a punishment unit that was banished to this planet to keep them out of the way. The Doctor then puts Clara in charge of the troops, warning her not to let them destroy the planet while he goes to rescue Angie and Artie. Since communications with the rest of the Empire are cut off, Clara has them relocate to a nearby castle to fortify it. Meanwhile, the Doctor finds Angie and Artie have been infected with the cybermites and are under the Cybermens’ control. A partially converted Webley reveals to the Doctor that the Cybermen have been secretly rebuilding themselves, kidnapping people from the amusement park before it closed. However, to further their plans, they need an advanced brain like the Doctor’s. The Doctor points out that Cybermen can only use humans, but Cyber-Webley reveals that they have upgraded themselves to the point where they can convert any organic lifeform, and infects the Doctor with cybermites. The Cyberman consciousness that attempts to take control of the Doctor’s mind, powered up by having access to a Time Lord brain, then dubs itself the Cyber-Planner. To prevent the Cyber-Planner from seizing control his mind, the Doctor threatens to initiate a regeneration, which would destroy the Cyberman implants in his brain. Realizing that they are at a stalemate, the Cyber-Planner agrees to the Doctor’s challenge to play a game of chess, with the winner taking control of the Doctor’s mind.
Meanwhile, at the castle, Clara takes stock of the platoon’s anti-Cybermen weapons. However, they only possess one anti-Cyberman gun, several hand pulsers, and a planet-destroying bomb. Clara takes possession of the bomb trigger and orders the Captain not to use the bomb’s verbal command. In a private moment, the Captain reveals that she knows Porridge is the missing Emperor, having once been part of the Imperial Guard. Porridge tells Clara that drastic measures are the only way to fight the Cybermen, and if a Cyberman cannot be immediately destroyed, then the entire planet must be destroyed. The Captain, having been sent to the punishment platoon for disobeying orders, decides to make up for her past failure by activating the bomb, despite Clara and Porridge’s protests. However, the Captain is shot and killed by a Cyberman before she can give the detonation command. Clara decides to go on the offensive, and working with the platoon, she manages to destroy the Cyberman attacking them.
In the Cyberman base, the Doctor manages to temporarily disrupt the Cyber-Planner’s control over him, and reunites with Clara, warning her that the Cyber-Planner will reactivate the rest of the dormant Cybermen in order to wipe them out. He then continues the chess game against the Cyber-Planner, knowing that it will not keep its promise if he wins. Posing as the Doctor, the Cyber-Planner then tricks Clara into giving it the bomb trigger, which it destroys. With no more threats to itself, the Cyber-Planner then sends its entire Cyberman army against Clara and the platoon. As the humans and Cybermen battle, the Doctor agrees to sacrifice his Queen and guarantee his loss in return for setting Angie and Artie free. The Doctor then bluffs the Cyber-Planner, saying he has a way to defeat him in three moves. Falling for the bluff, the Cyber-Planner shuts down the Cyberman army to use their processing power to figure out the Doctor’s strategy. The Doctor then uses the distraction to disable his implants with a powered up hand pulser, banishing the Cyber-Planner from his mind.
However, the Cybermen begin to reactivate. Porridge, who never wanted to be Emperor, reluctantly uses his voice command to activate the bomb, revealing that using this command will immediately summon his flagship which will automatically teleport him aboard. Everybody is transported to safety while the planet is destroyed along with all of the Cybermen. Porridge then asks Clara to marry him, impressed by her beauty and intelligence. However, Clara politely refuses, saying she has no wish to be the Queen of the Universe. The Doctor and Clara then return Angie and Artie home.
After scanning for any remaining Cyberman technology, Porridge orders his ship to return home. However, a single cybermite is seen floating through space.[/i]
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