Daleks’ Invasion Earth: 2150 A.D.

Tom Campbell pursues a jewellery-shop burglary and runs toward what looks like a police box to summon help. He enters the TARDIS, followed by Dr. Who, his niece Louise, and granddaughter Susan, and the ship departs for the future. The journey begins as they slip into the unknown.

The group materializes in London in 2150, discovering a city under Dalek occupation. The Daleks have invaded Earth, and a resistance fights to reclaim it. Captives are either brainwashed into Robomen or forced to labour in a Bedfordshire mine.

Dr. Who and Tom are imprisoned aboard a Dalek spaceship, starting a tense struggle for escape. Their captors transport them across space as the rebellion begins to take shape. The fate of the two humans hangs on the rebels' next move.

Wyler leads Louise and Susan to a London Underground resistance base where fighters gather. There they meet David and Dortmun, who plans to bomb the Dalek spaceship using rebels disguised as Robomen. The resistance begins coordinating its counterstrike.

During a bold attack on the Dalek spaceship, Dr. Who escapes alongside David while Tom and Louise remain trapped aboard. The raid shows the rebels' willingness to risk everything to weaken the Daleks. The escape marks a turning point in the struggle.

Wyler returns to the base to inform Dortmun and Susan that Dr. Who has escaped. They decide to hide on London's outskirts and bide their time until the rebels can regroup. The plan emphasizes caution in the face of Dalek retaliation.

Susan writes a brief message about their intentions to Dr. Who. The group commandeers a van, but Dortmun is killed by a Dalek patrol, forcing Wyler and Susan to abandon the vehicle as it is destroyed. The resistance suffers a major setback.

Dr. Who and David return to the now-deserted Underground station and fail to find Susan's message. They conclude that Wyler, Dortmun, and Susan have gone to Bedfordshire to investigate the mining operation and decide to pursue them. A dangerous pursuit looms.

Tom and Louise escape the Dalek spaceship as it lands and find themselves in a mining complex. A slave-worker helps them evade a Roboman and hides them in a tool shed. The miners' world offers a volatile backdrop for the next move.

Wyler and Susan shelter in a cottage near the mine, but the daughter returns with Daleks who capture them and take them to the mine's control centre. Their capture escalates Dalek control over the operation. The rescue may hinge on the mine's fragile loyalties.

Near the mine, black marketeers Brockley agrees to smuggle Dr. Who and David into the complex and leads them to the hiding place with Tom and Louise. They are joined by prisoner Conway, who reveals a Dalek plan to drop a bomb into the mineshaft and destroy Earth’s core, replacing it with a device to pilot the planet. The threat crystallizes the urgency of action.

Tom and Conway prepare a deflection ramp in the mineshaft while Dr. Who orders the Robomen to turn against the Daleks. A fierce battle erupts as the Robomen switch sides and the Daleks attempt to complete their plan. The bomb is deflected toward the pole convergence, altering the fate of the Earth and the Daleks.

The Daleks are pulled into the Earth's core and destroyed as their ship crashes and explodes in the mine. With the threat ended, the travellers prepare to return to the present in the TARDIS. The immediate crisis concludes with the future becoming the present again.

In a bid to alter history, Tom asks to be returned a few minutes before the burglary. They arrive back at the original scene and Tom knocks out the thieves, driving them away in their getaway car. He heads for the police station, hopeful of a long-promised promotion.