Ep 16. The Dalek Invasion of Earth, The End of Tomorrow

In "The Dalek Invasion of Earth, The End of Tomorrow," the first Doctor and his companions arrive in a devastated and desolate Earth in the 22nd century. The planet is under the invasion of the infamous Daleks who have taken over and enslaved humanity. Their mission is to transform the planet into a war machine capable of destroying other civilizations in the galaxy.

As the group tries to find a way to defeat the Daleks and free humanity from their rule, they encounter different groups of survivors hiding in underground tunnels and fighting against the invaders. They meet Barbara Wright and Jenny, two women who have hacked into the Daleks' communication system and plan to send a signal to their home planet in order to stop the invasion.

The Doctor and his companions join forces with the resistance and launch an attack to reach the Dalek spaceship and destroy it before it launches the signal that would doom Earth. They encounter different threats and challenges along the way, including the ruthless Dalek leader and his minions, as well as the giant Robomen, a group of humans whose minds have been controlled by the Daleks.

In a race against time, the Doctor and his companions must navigate their way through the destroyed city and reach the spaceship before it's too late. As they make their way through the different obstacles, they are constantly faced with the brutal reality of the invasion and the loss of innocent lives.

Ultimately, the episode is a tale of bravery, sacrifice, and hope. The group risks their lives to save humanity and prevent the Daleks from destroying other worlds. In the end, they succeed in their mission, but not without facing tragic losses and realizing the cost of war. The episode showcases the strong character development of the first Doctor and his companions, as well as their unwavering determination to do what's right and fight for what's good.