Season 18

(4 episodes)

The Doctor and Romana decide to forego Brighton Beach and take a much-needed holiday on the pleasure planet of Argolis. Ravaged decades ago by an interstellar war between the Argolin and the Foamasi, Argolis now hosts the Leisure Hive, an ideal retreat for tourists from all over the cosmos. But a series of accidents leads the Doctor and Romana to discover that the Hive holds dark secrets...

Written by David Fisher

(4 episodes)

On Tigella, two opposing factions are irrevocably divided over one fundamental issue: the Dodecahedron, a mysterious artifact which provides the entire planet's energy. With the Savants and the Deons locked in a crippling stalemate, and their civilization on the brink of collapse, the Tigellan leader Zastor seeks the Doctor's help. But the Doctor and Romana have been trapped aboard the TARDIS in a time loop by Meglos, the last of the Zolpha Thurans, who will stop at nothing to steal back the awesome power of the Dodecahedron.

Written by John Flanagan and Andrew McCulloch

(4 episodes)

The Doctor discovers the TARDIS has fallen into E-Space and landed on the planet Alzarius. Its only inhabitants live on a vast, dilapidated spaceship which they have been attempting to repair for generations in order to return to their home planet. But Mistfall, a legendary time of terror, is coming again to Alzarius, and an eerie menace is rising out of the misty marshes. The Doctor and Romana must solve the riddle of the strange Marshmen if they are to have any chance of returning to their own universe.

Written by Andrew Smith

(4 episodes)

Searching for a way out of E-Space, the Doctor and Romana, joined by young stowaway Adric, land on an Earth-like planet. Here the people live in fear of 'the Three who Rule'; cruel lords who live in a high tower overlooking their village. Suppressing all learning to keep their subjects ignorant and helpless, what chilling secret are these ruthless monarchs concealing? An ancient evil is rising once again and only the Doctor and Romana can destroy it.

Written by Terrance Dicks

(4 episodes)

A strange creature forces its way into the TARDIS steering them to a white void occupied only by the ruins of an old building and a spaceship. This empty space is a gateway to the past and future and the creature responsible for taking them there is Biroc, a Tharil, an enslaved race. The gateway offers the only exit out of E-Sapce, but the void is contracting. Are the Doctor and his friends fated to spend eternity in E-Space? And what final revelation awaits the Doctor?

Written by Steve Gallagher

(4 episodes)

Traken is a planet ruled by the all-powerful Keeper, who reigns for a thousand years and ensures that his subjects live a life of tranquility and harmony, free from the forces of evil and corruption. Now the Keeper is dying. Summoned by the ailing Keeper, the Doctor and Adric discover that all is not well on Traken. An evil presence threatens the future of the planet, an evil that knows all about the Doctor.

Written by Johnny Byrne

(4 episodes)

The Doctor and Adric head to Earth to fix the TARDIS's chameleon circuit hoping to restore the time machine's ability to blend into its surroundings. Once there they face danger involving a newly regenerated Master and a feisty young air hostess named Tegan Jovanka. How can the people of the distant and mysterious planet Logopolis help? And just who is the strange, ghostly figure watching the Doctor's every move?

Written by Christopher H. Bidmead