Ep 13. The Android Invasion: Part 1

The Android Invasion: Part 1 is the thirteenth episode in the thirteenth season of Classic Doctor Who. It was first aired on November 22, 1975, and was written by Terry Nation.

The story begins with the TARDIS landing in a deserted village on Earth. The Fourth Doctor (Tom Baker) and Sarah Jane Smith (Elisabeth Sladen) soon realize that things are not what they seem. They discover that they are not on Earth at all and that the village they are in is a replica of one on Earth, complete with android duplicates of the villagers.

The Doctor and Sarah are soon captured by a group of soldiers, who are under the command of a man named Guy Crayford. Crayford claims to be working for UNIT, a military organization that the Doctor has worked with in the past. However, the Doctor is suspicious of Crayford's motives, as he has never heard of him before.

Meanwhile, Sarah has been replaced by an android duplicate. The Doctor realizes that the androids are part of a larger invasion force, and that the real Sarah is in danger. He sets out to rescue her, but is hindered by the androids and the soldiers.

As the story unfolds, the Doctor begins to uncover the truth about the invasion force and its mysterious leader, who is only known as the "Think Tank". He discovers that the androids were originally created by a race of aliens known as the Kraals, who are planning to invade Earth and take over the planet.

The Android Invasion: Part 1 is a thrilling episode that keeps you guessing until the end. It is a classic example of the creative and imaginative storytelling that made Doctor Who a beloved sci-fi series. Fans of the show will enjoy this exciting adventure as the Doctor and Sarah Jane fight to stop the Kraals and save the Earth.