Arriving on the barren world of Androzani Minor, the Doctor and Peri find themselves embroiled in a long running, literal underground war. At the heart of the conflict is a substance called Spectrox - both valuable and deadly! The Doctor & Peri wind up being poisoned by the material, which is killing them slowly and painfully unless they can find a cure. As the conflict heats up and the situation gets more desperate, the Doctor realises time is running out - both for Peri and himself...

Sorry! is a British sitcom that aired on BBC1 from 1981 to 1982 and from 1985 to 1988. Starring Ronnie Corbett, it was written by Ian Davidson and Peter Vincent, both of whom had previously written for The Two Ronnies, of whom Corbett was one half. The theme music was composed by Gaynor Colbourn and Hugh Wisdom, and arranged and conducted by Ronnie Hazelhurst. The outdoor scenes were filmed in Wallingford, Oxfordshire.

The adventures of The Doctor, a time-traveling humanoid alien known as a Time Lord. He explores the universe in his TARDIS, a sentient time-traveling spaceship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Along with a succession of companions, The Doctor faces a variety of foes while working to save civilizations, help ordinary people, and right many wrongs.