Ep 12. Nightmare in Silver

In the twelfth episode of season seven of Doctor Who (2005), titled "Nightmare in Silver," the Doctor takes his companions Clara Oswald and two children, Angie and Artie, to Hedgewick's World of Wonders, an abandoned theme park that was once the greatest in the galaxy. Upon arrival, the group discovers that the park has been taken over by thousands of Cybermen who have been lying dormant for centuries. The Doctor and his companions must now fight to save the universe from the Cybermen's ultimate goal of total domination.

When the Doctor and his companions enter the park, they are greeted by the Emperor of a race called the Porridge who asks for their help in defeating the Cybermen. The Porridge explains to them that the Cybermen have taken over the park and have sealed themselves in a part of it called "the tomb." The Doctor and his companions discover that the Cybermen have been laying dormant in the park for centuries after being defeated in a battle by the humans of Hedgewick's World of Wonders.

The group sets off to find the tomb and investigate the Cybermen's plans. As the group makes their way through the park, they encounter various dangers, including a chess-playing Cyberman who takes over the mind of one of the children and threatens to use him as a bargaining chip against the Doctor. To defeat the Cyberman, the Doctor engages him in a game of chess, with the fate of the boy and the universe hanging in the balance.

Ultimately, the Doctor and his companions reach the tomb, where they discover that the Cybermen have developed a new upgrade that allows them to be even more powerful than before. This upgrade is powered by a sentient metal called Cybermat, which can adapt and evolve at an alarming rate, making it nearly unbeatable.

The Doctor realizes that the only way to stop the Cybermen is to engage them in a virtual reality world that he creates inside his own mind. In this reality, the Doctor and the Cybermen engage in a battle of wits and strategy, with the fate of the universe hanging in the balance.

As the Doctor and the Cybermen continue to battle in the virtual world, Clara, Angie, and Artie must fend off the remaining Cybermen and protect the park from destruction. With time running out, the group must work together to defeat the Cybermen and save the universe from certain doom.

The episode "Nightmare in Silver" is a thrilling adventure that sees the Doctor facing off against one of his greatest foes. With danger at every turn and the fate of the universe hanging in the balance, the Doctor, Clara, Angie, and Artie must work together to save the day. This action-packed episode is full of twists and turns, making it a must-see for any Doctor Who fan.