The Daleks' plan to transform Earth into a giant spaceship and wipe out its inhabitants is nearing completion and the Doctor and his friends face a race against time to prevent them from destroying the planet's core.

The Doctor finally discovers what the Monk is up to and must move fast to prevent his opponent from altering the course of history.

Ian and Barbara believe the TARDIS has finally returned to their contemporary London, but soon discover signs of plague and warfare. Their old enemies, the Daleks, have invaded the Earth of the 22nd century. Separated and fighting for their lives, the travellers must try to aid the remaining humans and overthrow the Daleks' cruel tyranny. (Originally broadcast in six parts.)

The Doctor and Ian are taken to the Dalek saucer while Susan and Barbara join the rebels in planning an attack.

The Doctor manages to escape from the Dalek saucer and meet up with Susan and David but Ian is left trapped onboard. Meanwhile, Barbara and her new friends face a dangerous journey across London.

The Doctor's party investigate the Daleks' central control in Bedfordshire while Barbara and Jenny's attempt to reach it are derailed when they are betrayed.

The TARDIS arrives on a planet that has been turned into a space museum but the Doctor and his friends are puzzled when they find themselves out of phase with their surroundings.

The Doctor and his friends are taken into the Mechanoid City but their troubles are far from over...especially when the Daleks launch an attack.

The Doctor, Vicki, and Steven Taylor, go to 1066 England, but something doesn't seem right including modern inventions like a Gramaphone and electricity. Could there be another Time Lord?

The Doctor manages to escape from his cell and get the upper hand on the Monk but his plans are derailed when Sven and Ulf arrive at the monastery.

While Susan and David try to find a way out of London, Ian and Larry infiltrate the Dalek mine workings.

Ian and Delos manage to escape from Sevcheria and Tavius agrees to help Barbara rejoin them.The Doctor's attempts to avoid being thrown to the lions inadvertently result in Nero deciding to burn down Rome.

The Doctor is being held prisoner by the Monk and Steven and Vicki's search for him brings them to the Saxon village.But a greater danger threatens when a Viking raiding party arrives.

While the Doctor and Vicki meet with Nero, Barbara is taken to Rome to be sold while Ian is forced to work as a galley slave.

The Doctor and Ian reach the crashed spaceship and meet up with Barbara and Vicki, where the Doctor uncovers the truth about Koquillion.

The travellers decide to take a holiday near ancient Rome, but after a month the Doctor gets restless. He and Vicki determine to visit Rome, and while they are gone Ian and Barbara are abducted by slave traders. All roads lead to Rome, however, and the travellers find themselves at the mercy of the country's petulant emperor, Nero... (Originally broadcast in four parts.)

Ian and Delos are forced to fight each other for their freedom while the Doctor has to perform for Nero's court.

The Daleks pursue The Doctor through time and space, with the intentions of exterminating him. Places they land include the Mary Celeste, a haunted house and the empire state building.

On the planet Dido, the monstrous Koquillion terrorizes Bennett and Vicki, the only survivors of a crashed spaceship. When the TARDIS lands, the Doctor, Ian, and Barbara team up with Vicki to discover what Koquillion is hiding. (Originally broadcast in two parts.)

With Vicki trapped on board the Dalek time machine, the Doctor, Ian and Barbara decide to make their stand on the planet Mechanus.

When the TARDIS malfunctions and the doors open in the time vortex, the travellers and their Ship shrink to the size of insects. When they arrive on Earth, they uncover a murderous plot involving a new insecticide - but how can they stop the crime in their miniaturised condition ? (Originally broadcast in three parts.)

The TARDIS lands in the Holy Land during the Third Crusade and the crew help save Richard the Lionheart from an ambush, but Barbara is captured and brought before Saladin.

Barbara allies herself with a man whose were murdered by El Akir as the Doctor and Vicki are caught up in Richard's plan to offer his sister's hand in marriage to Saladin's brother.

Now back on their proper time track, the Doctor and his friends must work to avoid the future they saw for themselves.

The TARDIS crew's attempts to escape from the Daleks take them to the top of the Empire State Building and a 19th century sailing ship.