The year is 2084, and two power-blocs are poised on the brink of war. Using a series of undersea complexes and deep-space satellites, each bloc carefully monitors the other's movements, slowly edging towards the moment when one will launch an...
The TARDIS materialises in Mexico during the Aztec civilisation. The Doctor and his companions step outside to discover they are inside a tomb — the tomb, it turns out, of Yetaxa, once High Priest of the Aztecs.
Barbara is hailed as Yetaxa's...
Inferno is the name of a top-secret drilling project to penetrate the Earth's crust and release a major new energy source.
A crisis develops when a noxious liquid leaks out as drilling progresses — the green poison has a grotesquely debilitating...
History books don't always tell the whole story. Certainly there is no record of an episode that occurred when the Scots, led by Bonnie Prince Charlie, were defeated by the English at the Battle of Culloden in 1746...
And the presence at the time of...
The TARDIS has drifted into the future and comes to rest hovering over Frontios, refuge of one group of survivors from Earth who have escaped the disintegration of their home planet.
The Doctor is reluctant to land on Frontios, as he does not wish...
From the moment they land on the planet Androzani Minor, everything goes wrong for the Doctor and his new young companion, Peri.
They become involved in the struggle between brutal gun-runners, ruthless Federation troops, and the hideously mutilated...
The Doctor is enjoying the sun on a holiday island — but things are soon hotter than he bargained for.
The young American Perpugilliam Brown brings to the TARDIS a mysterious object that her archaeologist step-father has found in a sunken wreck....
As the TARDIS lands on a remote mountainside, the power fails and leaves the Doctor and his companions stranded without heat or water. They are rescued by the Venetian traveller Marco Polo, who tells them it is the year 1289. They join Marco's...
The Doctor has promised Tegan that they will visit her grandfather in the English village of Little Hodcombe, in the year 1984, a precision of timing and location that the TARDIS has not always achieved...
When the Type-40 machine comes to rest, the...
Eminent scientist Emil Keller has developed a revolutionary new process for the treatment of hardened criminals. His invention, the Keller Machine, is being heralded as a major scientific breakthrough.
But Professor Keller is in truth the Master and...