Ep 21. Earthshock (3)

The Doctor and his companions Tegan, Nyssa and Adric continue their journey through time and space in the TARDIS, the Doctor's time machine. In "Earthshock (3)," the 21st episode of season 19 of Doctor Who, the crew lands on Earth in the 26th century. They find a team of soldiers led by Captain Briggs who are investigating the disappearance of a group of scientists who were studying a strange asteroid that landed on Earth. As they explore the caves around the asteroid, they begin to encounter danger.

The Doctor and the soldiers discover that the asteroid is not what it seems - it is actually a space freighter that has been commandeered by a group of Cybermen, the Doctor's old enemies. The Cybermen are planning to destroy Earth and the Doctor must stop them before it's too late.

Meanwhile, Adric, the youngest member of the crew, finds himself in over his head as he tries to help the crew fend off the Cybermen. He makes a bold move that could save everyone, but it could also lead to his own demise.

As the Doctor and his companions battle the Cybermen, they begin to uncover a larger plot involving time travel and the fate of the human race. The Doctor must use all of his knowledge and cunning to stop the Cybermen and save the Earth.

"Earthshock (3)" is a thrilling and action-packed episode of Doctor Who that will keep viewers on the edge of their seats. With classic villains, unexpected twists, and high-stakes drama, this episode is a must-see for fans of the series.