Season 1

(4 episodes): An Unearthly Child - The Cave Of Skulls - The Forest Of Fear - The Firemaker

Two schoolteachers, Ian Chesterton and Barbara Wright, become concerned by the unusual behavior of their fifteen-year-old student, Susan Foreman. When they follow her home, they meet her mysterious grandfather, the Doctor, and find themselves unwilling passengers on his time ship, the TARDIS...

Written by Anthony Coburn

(7 episodes): The Dead Planet - The Survivors - The Escape - The Ambush - The Expedition - The Ordeal - The Rescue

The TARDIS lands in a petrified forest on an alien planet. Determined to explore, the Doctor leads his companions into the metal city, where they discover the danger of what will become his deadliest enemies, the mutant Daleks.

Written by Terry Nation

(2 episodes): The Edge Of Destruction - The Brink Of Disaster

In this completely TARDIS-based story, the crew find themselves and their ship acting very strangely indeed. Blame runs high for the ship's unusual behavior, until the Doctor realizes the TARDIS itself may be trying to warn them…

Written by David Whittaker

(7 episodes): The Roof Of The World - The Singing Sands - Five Hundred Eyes - The Wall Of Lies - Rider From Shang-Tu - Mighty Kublai Khan - Assassin At Peking

The TARDIS materialises at the Roof of the World, Central Asia, in 1289. There they meet Marco Polo and his fellow travellers, on their mammoth journey across the Pamir Plateau and through the Gobi desert to Peking. Unfortunately for the Doctor, the TARDIS proves to be of immense interest to Polo, who sets his mind on presenting it to the mighty Kublai Khan on arrival at his court. But Polo isn't the only one with designs on the TARDIS. The war-like Tegana will go to any lengths to steal the magical blue box, lengths which endanger the lives of all the travellers. When the Doctor meets Kublai Khan himself, his precious ship is his only collateral in a high-stakes game of backgammon and Khan is a master of the game...

Written by John Lucarotti

(6 episodes): The Sea Of Death - The Velvet Web - The Screaming Jungle - The Snows Of Terror - Sentence Of Death - The Keys Of Marinus

On a remote island of glass surrounded by a sea of acid, there is a machine that can remove evil from the minds of an entire population, the Conscience of Marinus. Fearful of its immense power falling into the wrong hands, its sole guardian has scattered the machine's operating keys across the planet. The TARDIS crew arrives to find the island under attack by the evil Voord. Marinus' last line of defense, and its only hope, is the Conscience machine. The Doctor and his companions must undertake a deadly quest to recover the keys of Marinus...

Written by Terry Nation

(4 episodes): The Temple Of Evil - The Warriors Of Death - The Bride Of Sacrifice - The Day Of Darkness

The TARDIS materialises in Mexico in the 15th Century, where the Doctor and his companions soon discover that it is a bloodthirsty and dangerous place. With Barbara mistaken for a reincarnation of an Aztec high priest called Yetaxa, she thinks that she can put an end to the barbaric human sacrifices once and for all. But can she rewrite history without disastrous consequences?

Written by John Lucarotti

(6 episodes): The Strangers In Space - The Unwilling Warriors - Hidden Danger - A Race Against Death - Kidnap - A Desperate Venture

The Doctor and his companions land on a spaceship orbiting a distant and mysterious world, where a human crew lie frozen somewhere between life and death. The planet is the Sense-Sphere, home of the Sensorites, beings of immense intelligence and power. Unable to leave, the Doctor and his companions must deduce the Sensorites' intentions: are they friendly, hostile, or frightened? And what is the deadly secret at the heart of the Sense-Sphere?

Written by Peter R. Newman

(6 episodes): A Land Of Fear - Guests Of Madame Guillotine - A Change Of Identity - The Tyrant Of France - A Bargain Of Necessity - Prisoners Of Conciergie

The TARDIS arrives near Paris during the French Revolution, a time of great upheaval, bloodshed and terror. Soon, with the Doctor trapped inside a burning farmhouse, Ian imprisoned and Susan and Barbara on their way to the guillotine, it's clear this will be one of their most dangerous and exciting adventures yet...

Written by Dennis Spooner