Two classic Doctor Who adventures, one from the 1970s and one from the 1980s, both featuring those sinister humanoids the Cybermen. In 'Revenge of the Cybermen' (1975), the Doctor (Tom Baker), Sarah Jane (Elisabeth Sladen) and Harry (Ian Marter) return to the space station Nerva (from 'The Ark in Space') to recover the TARDIS. They discover the crew decimated by a strange plague, to which Sarah falls prey. The Doctor realises that the plague is part of a plot by the Cybermen to destroy Voga, the planet of gold - gold being the only thing which is lethal to them. At the same time the Vogans are planning to destroy the Cybermen with their Skystriker rocket. The three-part adventure 'Silver Nemesis' (1988) was made to celebrate Dr Who's 25th anniversary. A statue, blasted into space 350 years ago, crashes into Earth in the core of a meteor. The Doctor (Baker) and his assistant Ace (Sophie Aldred) must fight two armies from different time periods, a regiment from 1988 and a battallion of soldiers from 2688, whilst guarding the statue from the clutches of the Cybermen.

Another adventure for the intrepid time traveller. While visiting a Galactic Tollport, the Doctor (Sylvester McCoy) and Mel (Bonnie Langford) win a trip to Disneyland in 1959. On board the spacebus they meet Chimeron queen Delta, whose people have been wiped out by mercenary Gavrok (Don Henderson) and his men. Knocked off course by a satellite, the bus in fact delivers its passengers to the Shangri-La holiday camp in Fifties Wales, but while the Doctor becomes determined to make the most of the break - and Delta embarks on a romance with Earth mechanic Billy - Gavrok is not far behind. Watch out for a guest appearance by Ken Dodd as the Tollmaster.

The longest 'Doctor Who' story ever. The Doctor (Colin Baker) is put on trial by his people the Time Lords for interference in the affairs of others; three segments of his past and future are presented as evidence. 'The Mysterious Planet' shows the Doctor and Peri (Nicola Bryant) in a battle with a megalomaniac machine on the planet Ravalox, but what are the mysterious 'secrets' it protects? 'Mindwarp' shows the Doctor apparently betraying Peri to the vile Sil (Nabil Shaban) and the Mentors - can the Matrix be falsifying the evidence against the Doctor? In his defence he presents 'Terror of the Vervoids', a future story where the Earth is threatened by evil plant life forms. In the final two episodes, 'The Ultimate Foe', the Doctor learns the truth about his prosecuting counsel, the Valeyard (Michael Jayston), and has to enter the Matrix to battle for his remaining lives. This was Colin Baker's last story as the Doctor.

Sylvester McCoy stars as the seventh doctor in this double bill of three-part serials, both of which feature the character Ace (Sophie Aldred), from the BBC's long-running sci-fi show. In 'Dragonfire' the Doctor and Mel (Bonnie Langford) find themselves on the planet Svartos where they are forced by the evil, exiled Kane (Edward Peel) to search for the mysterious Dragonfire. Dragonfire is Kane's only chance to help mastermind a bitter revenge plot and escape home. In 'The Happiness Patrol' the Doctor and Ace arrive on planet Terra Alpha, ruled by Helen A (Sheila Hancock), where the inhabitants are sentenced to death by the Happiness Patrol if they display signs of sadness. The Doctor and Ace attempt to bring down Helen A's regime but first they will need to deal with her followers, including demented executioner the Kandy Man (David John Pope).