(7d) TIME AND THE RANI - The Rani sends the Tardis off course to land on the planet Lakertya, triggering off the Dr's sixth regeneration into a new physical form. On Lakertya, the Rani and her batlike henchmen, the Tetraps, are oppressing the lethargic local populace while working on a sinister project. Bonnie Langford returns as Melanie. Melanie comes face to face with the regeneration. The Tetraps, the hideous monsters oppressing the people of Lakertya, are seen for the first time and Wanda Ventham joins the cast as Faroon, a Lakertyan, who becomes unwittingly involved in the Rani's sinister project. The Dr is taken to the Centre of Leisure. There he finds, all that glitters is not silver. Is Melanie really Melanie? In the final episode, Doctor Who and Melanie defeat the plans of the Rani and liberate the planet from her evil powers.

(7e) PARDISE TOWERS - The Doctor and Mel set off for the futuristic high-rise resort planet of Paradis Towers, in search of a well-earned rest. Originally planned as the ultimate in leisure living, Paradise Towers is a giant colony of exotic skyscrapers, crowned with a luxury swimming pool. But on arrival, the Doctor and Mel discover that the Tower society is anything but paradise. It has become a squalid, rat-infested urban nightmare, populated by a bizarre society at war with itself. The Kangs are gangs of young girls, post-holocaust punk nymphets armed with crossbows, fighting amongst themselves and running wild in the concrete corridors of Paradise Towers. They spray the walls with strange graffiti, the cave paintings of a futuristic Stone Age. Cleaning up these 'wall Scrawls' and hunting down the Wall Scrawlers are the Caretakers - ruthless bureaucrats who live and die (and kill) by the Rule Book. Caught between the Kangs and the Caretakers, but more ruthless than either, are the Rezzies - the residents of this skyscraper society. These apparently sweet, harmless old ladies have been forced by hard times to look for unusual alternative sources of nutrition. And they would very much like to invite Mel for tea. As well as these human menaces, there is the homicidal behaviour of the Mark 7 Megapodic robot-cleaning machines; and what exactly is lurking in the basement? Entering this dangerous and divided world, the Doctor sets out to solve the mystery of the Towers. Why has Paradise turned into a living hell?

(7f) DELTA AND THE BANNERMEN - When the Tardis lands beside a galactic toll booth, the Doctor and Mel think their worst problem will be finding the right change. Unfortunately for them, Toll Port G179 is the launching point for Nostalgia Tours, an alien travel company organising vacations through time and space for extra-terrestrials. In this case, the destination is planet Earth; the year is 1959 and the tourists are Navarinos - large bulbous purple creatures (transformed before departure to look like human beings, in suitable period dress). As the Toll Port's 10 billionth customers, the Doctor and Melanie are awarded a free place on the trip. The trouble starts when a beautiful alien called Delta stows away on the tour cruiser. Delta is the last of the Chimeron royal line, and the only survivor of her race, which was exterminated following a final battle with their natural enemies - the militaristic Bannermen. After a technical hitch or two, the Doctor and Mel land in Wales in 1959 with the party of tourists, expecting bobby sox and 1950's music. But the Bannerman warfleet, under the leadership of Gavrok, is only a few hours behind. Delta is the only surviving witness to their act of Genocide, and they will not rest until she is dead. Somehow among the blue suede shoes, red guitars, alien bounty hunters and bizarre lifecycles, the Doctor must survive and see that justice is done.

(7g) DRAGONFIRE - Kane runs Iceworld, a space trading colony on Svartos. Iceworld is a huge galactic freezer centre, selling food and supplies to space travellers. The permanently frozen dark side of Svartos is an ideal location for Kane, but even the dark, snow-covered passage ways of Iceworld are too warm for him. A native of the planet Proamon, Kane has a body temperature of minus 193 degrees celcius. Like Dracula seeking his coffin at daybreak, Kane must periodically return to a freezing unit and lie dormant within it, until his body temperature is restored. When the Doctor and Melanie arrive on Svartos, they receive a cool reception from Kane. For 3000 years he has been plotting his revenge, and his return. Now his army of cryogenically frozen mercenaries is almost ready and all Kane needs before he returns home is the mysterious treasure called the Dragonfire. To find the Dragonfire he needs a band of adventurers brave and curious enough to penetrate the dark, frozen depths of Iceworld and find a treasure guarded by a monster. Kane finds 4 unwitting volunteers in the Doctor, Melanie, Glitz (a shady interstellar hood) and Ace, a rebellious teenage waitress they have picked up on their travels. Ace is an amateur explosives expert from 1987 London, who was transported through time and space when one of her experiments went wildly wrong. When Melanie leaves the Doctor at the end of the story, Ace becomes his new companion.

(7h) REMEMBRANCE OF THE DALEKS - The 25th anniverary season starts with a deadly encounter against the Doctor's oldest and most dangerous adversaries - the Daleks - when he makes a harrowing return to the programme's roots, a school playground in 1963 London. The Doctor finds 2 competing factions of Daleks lying in wait for him. It emerges that the Doctor has unfinished business with the Daleks. The Doctor and Ace battle to defeat the Daleks.

(7j) THE GREATEST SHOW IN THE GALAXY - The Doctor and his assistant Ace, are lured by a promotional brochure to visit the Psychic Circus on the planet Segonax. Mysterious forces on the planet have corrupted the Circus, changing it from an innocent futuristic entertainment to a death trap. With the help of a disaffected member of the Circus and another traveller trapped on Segonax, the Doctor and Ace confront the evil powers that have taken over the Psychic Circus. Guest appearances include Christopher Guard, T.P. McKenna, Gian Sammarco, Jessica Martin and Peggy Mount.

(7k) SILVER NEMESIS - A meteor crashes to earth containing a statue that was fired into space 350 years earlier. The Doctor and his assistant Ace, must fight enemies both from 1638 and 1988 and overcome the Cybermen to gain control of the Silver Nemesis. The Doctor is a Time Lord, the possessor of 2 hearts, a temperature of 60 degrees farenheit and immense longevity. Bored with Gallifrey, his own super-advanced planet and fellow Time Lords, he roams through space and time in a personalized ship, the Tardis (Time and Relative Dimension In Space). His space ship is temperamental and unreliable, and due to the chameleon circuit having jammed on a visit to London in the 60's, the Tardis exterior remains as a police box. Guest artists in Silver Nemesis include Fiona Walker, Anton Diffring and Broadway star Dolores Gray - who plays an American tourist.

(7l) THE HAPPINESS PATROL - The Doctor and Ace visit Terra Alpha and discover that the cheerful facade of the planet's society conceals a monstrous oppression. The Doctor must defeat a murderous robot called the Kandy Man, and the evil militia called the Happiness Patrol. Sophie Aldred plays Ace and there are guest appearances from Sheila Hancock, Ronald Fraser, Georgina Hale, Lesley Dunlop and Rachel Bell.

(7m) THE CURSE OF FENRIC - The Doctor and Ace are put to the ultimate test when the Tardis dematerializes in Second World War England at a top-secret naval base. The army church, built on Viking graves, bears the inscription calling for the wolves of Fenric to return for their treasure. Thereafter evil will reign... Even as the Doctor translates the words, hideous corpses rise up from the sea, the evil Fenric now free to summon his wolves to a killing rampage.

(7n) BATTLEFIELD - The near future. In England's green and pleasant land, routine military manouvres are disrupted by a mysterious electrical interference. A missile convoy is stranded by the site of an ancient battle, which is to become the site of a final confrontation between combatants from another universe. UNIT arrives to deal with a technical mishap and they find themselves confronting black magic and all out war. The Doctor and Ace arrive to witness the beginning of this conflict, between strange races of warriors who come from a world where the Arthurian legends are historical truth. Sword and sorcery meets science fiction and the Brigadier returns to join forces with the Doctor to combat knights, demons and a nuclear warhead ticking inexorably towards zero.

(7p) SURVIVAL - A story of mystery and peril on 2 worlds. Something savage is stalking the streets of London, and humans are its prey. People are vanishing. But only young, healthy people. When the Doctor takes Ace on a sentimental journey to her old neighbourhood, they discover all her friends are missing. The Doctor and Ace are drawn into investigating, and become prey themselves. They are carried away to another planet - the Hunting World. A violent wasteland, where human beings are hunted by the Cheetah People. The Cheetah People are ruthless, ancient and implacable creatures, but the real enemy is an old acquaintance of the Doctor's. It is the Master who has brought the Doctor here, but for once he is not seeking the Doctor's destruction. The Master is trapped on the Hunting World and unless the Doctor can discover a means of escape, they all face death.

(7q) GHOST LIGHT - Ace has told the Doctor about her "worst place in the Universe" and the Doctor takes her there. They travel to Victorian England and enter a house called Gabriel Chase. It is a haunted house and the house of Ace's nightmares. They discover that the butler is a Neanderthal, the cellar is a spaceship and the master of the house is a most unusual Victorian gentleman. Josiah Solomon Smith is, by all appearances, a perfect Victorian - but with a strange aversion to light. But Josiah does not belong in Victorian England or on Earth. Gabriel Chase has been invaded by powers from another world. Alien powers are running amok, infiltrating and threatening to assassinate Queen Victoria and take over the British Empire. To defeat them, the Doctor summons the ancient powers of a creature trapped in the cellar, only to discover he's unleashed a tiger to catch a wolf.