Back in the gun-totin', hard-hittin', fast-shootin' days of the Old Wild West, when outlaws ruled the land and the good guys stayed off the streets, a troupe of travelling players - Miss Dodo Dupont, Steven Regret and the mysterious Doctor Caligari - moseyed into the town of Tombstone one October afternoon.

Their transportation was a mite peculiar though. After all, a police box materialising out of thin air sure ain't the usual way to enter a sedate town like Tombstone...

And when the Doctor and his partners meet up with Wyatt Earp and the notorious Clanton brothers, they soon find out that the scene is all set for high noon at the O.K. Corral...

Outside the bounds of this world lives Kronos, the Chronivore - a mysterious creature that feeds on time itself.

Posing as a Cambridge professor the Master intends to use Kronos in his evil quest for power.

To stop him, the Doctor and Jo must journey back in time to Ancient Atlantis and to a terrifying confrontation within the Time Vortex itself.

But can even the Doctor save himself from the awesome might of the Time Monster?

The Doctor has regenerated, having sacrificed his fifth persona to save Peri's life. But things are not going well...

On this occasion the process of regeneration is by no means smooth, for the even-tempered, good-humoured fifth Doctor has given way to a rather disturbed and unsettled successor.

In a particularly irascible moment the new Doctor comes dangerously close to committing a shocking crime. Overwhelmed with guilt for his violent behaviour, the repentant Time Lord decides to become a hermit...

Following a skirmish in deep space, two alien spacecraft have crashlanded on a barren planet in Galaxy Four. The Drahvins are a race of beautiful females, led by the imperious Maaga. The Rills are hideous tusked monstrosities, accompanied by their robotic servants, the Chumblies. When the Doctor arrives, he discovers that the planet will explode in two days' time. The Drahvins desperately ask for his help in escaping the planet and the belligerent Rills. But things are not always as they seem...

The inhabitants of the planet Karfel are suffering under the tyrannical rule of their leader, the Borad, who has brought his world to the brink of interplanetary war.

Those who dare to oppose the will of the Borad are mercilessly sacrificed to the Timelash, a fate considered by many to be worse than death.

When the Doctor arrives on Karfel he soon discovers the Borad's horrifying plan, a plan which will directly affect his young American assistant, Peri...

The TARDIS has stalled in mid-flight, and it is only on the planet Varos that the Doctor can find the precious Zeiton-7 ore he needs to continue his travels through time and space. Arriving on the planet, he saves the rebel Jondar from execution, and incurs the wrath of Sil, the sadistic representative of the Galatron Mining Corporation on Varos. The hunt is on for the Doctor and his rebel friends. And as they are pursued through the corridors of the deadly Punishment Dome, the Doctor discovers that the people of Varos have some very disturbing ideas of entertainment...

En route to Kew Gardens, the Doctor and Peri are more than a little surprised when they land in the middle of a slag heap in England at the time of the Luddite uprisings.

Unknown to the Doctor, his TARDIS has been dragged off course by the Master who plans to destroy his arch enemy once and for all, and pervert the course of history.

But also present is the Rani, another exile from Gallifrey, who is conducting her own evil experiments on the humans of the nineteenth century. Soon the Doctor discovers that the female of the species is far, far deadlier than the male...

It is 4 March, 1215, and the TARDIS materialises in England during a jousting match held in the presence of King John. But it soon becomes apparent to the Doctor that something is very seriously wrong. Why does John express no fear or surprise at the time-travellers' sudden appearance, and indeed welcome them as the King's Demons? And what is the true identity of Sir Gilles, the King's Champion? Very soon the Doctor finds himself involved in a fiendish plan to alter the course of world history by one of his oldest and deadliest enemies.

Landing on a distant planet, the Doctor confidently announces to his companions that the TARDIS has brought them to an age of great advancement, peace and prosperity.

The Doctor's calculations seem to be confirmed when the travellers are greeted by Jano and the Elders who take them on a tour of their city - a haven of beauty, harmony and friendship, set in a wilderness inhabited by tribes of savages.

But the security of the city is founded on one deadly and appalling secret. Soon the Doctor and his friends discover that it is not only outside the city walls that savages dwell...

In the dark uncharted depths of the North Sea it has lurked, growing in strength, growing in size, and striking terror into the hearts of mariners down the untold centuries.

Landing near a North Sea gas refinery off the east coast of England, the TARDIS crew are immediately accused of sabotage. Several rig crews have mysteriously vanished, strange pressure build-ups have been detected, and in the refinery's pipelines the Doctor can hear the steady, rhythmic beat of - what?

Soon the Doctor, Jamie and Victoria will find themselves at the unrelenting mercy of the deadliest and most terrifying foe they have ever encountered...

Somewhere outside space and time there waits the Celestial Toymaker, an enigmatic being who ensnares unwary travellers into his domain to play out his dark and deadly games. Separated from the security of the TARDIS, the Doctor is forced to play the complex trilogic game with the evil magician. Meanwhile, Dodo and Steven must enter into a series of tests with, among others, the schoolboy Cyril and the King and Queen of Hearts. If they lose, they are condemned to become the Toymaker's playthings for all eternity. For in the malevolent wonderland that is the Celestial Toyroom, nothing is just for fun...

Returning to Earth in the 21st century, the Doctor, Jamie and Zoe immediately find themselves caught in the midst of a crisis. T-Mat - a form of instantaneous transportation essential to the smooth running of life on Earth - is going disastrously wrong. The Doctor discovers that the T-Mat Base on the Moon has been taken over by a group of Ice Warriors, led by the villainous Slaar. Their home a desolate and dying planet, the Martian invaders see Earth as a world ripe for conquest. But before they can colonise Earth they must dramatically alter its atmosphere. And so they unleash the Seeds of Death...

On a lazy June afternoon in 1925 the TARDIS materialises at the tiny railway station of Cranleigh Halt. Warmly welcomed by the local gentry, the time-travellers look forward to a well-deserved rest from their adventures.

After a stunning performance at a friendly cricket match, the Doctor, together with Tegan, Adric and Nyssa, is invited to a splendid masked ball by Lady Cranleigh and her son, Charles.

But a dark menace haunts the secret corridors of Cranleigh Hall. And before the ball is over, the quiet summer will be shattered by the shocking discovery of a brutal murder...

It is ten million years in the future and the Earth is about to plunge into the Sun. A gigantic Space Ark has been launched to take the last of humanity to a new life on the planet Refusis. Accompanying the Humans on their journey are the Monoids, strange reptilian creatures from an alien world. When the TARDIS materialises on board, the Doctor and his friends are greeted with suspicion which soon turns to open hostility when Dodo inadvertently infects the Ark's crew with a long-forgotten virus. It is an accident which will have a terrible effect on mankind, an effect which will last for seven hundred years...

To escape a catastrophic volcanic eruption the Doctor takes the TARDIS out of space and time - and into a void he can only describe as 'nowhere'. But the crisis is far from over and when the time-machine's circuits overload, the TARDIS explodes. The Doctor, Jamie and Zoe come to in a dark unearthly forest. There they encounter a host of characters who seem somehow familiar: a beautiful princess with long flaxen hair, a sea traveller dressed in eighteenth-century clothes, and a white rabbit frantically consulting his pocket watch... What is happening to the three time-travellers? What strange power guides their actions? In the Land of Fiction who can really tell?

In the summer of 1966, thousands of young people are taking their holidays with Chameleon Tours. And not one of them is coming back. When the TARDIS lands at Gatwick Airport the Doctor is drawn into a web of intrigue and deception. To add to his troubles, Polly mysteriously vanishes. Or does she? The girl at the Chameleon Tours desk looks like Polly, and even sounds like her, but she claims she comes from Zurich. Who is she really? Who is behind these abductions? And for what sinister purpose? Soon the Doctor and Jamie must face a desperate group of faceless aliens - the deadly Chameleons...

The TARDIS materialises on what, at first sight, appears to be a dry and lifeless planet, serving only as a graveyard for spaceships. Then the TARDIS crew discovers a magnificent museum housing relics from every corner of the galaxy. These have been assembled by the Moroks, a race of cruel conquerors who have invaded the planet Xeros and enslaved its inhabitants. Upon further exploration the Doctor, Ian, Barbara and Vicki seem to stumble upon the impossible. For suddenly facing them in an exhibit case they find - themselves.

The TARDIS materialises on board a dark and silent spaceship. As the Doctor, Susan, Ian and Barbara penetrate the craft's eerie gloom they come across what appear to be the bodies of two dead astronauts. But the astronauts are far from dead, and are living in mortal fear of the Sensorites, a race of telepathic creatures from the Sense-Sphere. When the lock of the TARDIS is stolen the Doctor is forced into an uneasy alliance with the aliens. And when he arrives on the Sensorites' planet he discovers that it is not only the Humans who have cause to be afraid...

It is 1794 and the TARDIS materialises some distance away from Paris during the French Revolution - the infamous Reign of Terror. Soon the TARDIS crew find themselves caught up in the tangled web of historical events. Imprisoned in a dank dungeon, Ian is entrusted with delivering a message to master-spy James Stirling. Who is James Stirling? What world-shattering events are being discussed in a deserted inn off the Calais road? And can the Doctor and his friends escape a violent and bloody death at the dreaded guillotine?

The TARDIS crew members have taken a break from their adventures and are enjoying a well-deserved rest in a luxury villa on the outskirts of Imperial Rome. But in the gory grandeur that is Rome, things don't stay quiet for long. If the time-travellers can save themselves from being sold as slaves, assassinated by classical hit-men, poisoned by the evil Locusta, thrown to the lions, maimed in the arena and drowned in a shipwreck, they still have to face the diabolical might of the mad Emperor Nero. As if that isn't enough, they also discover that, although Rome wasn't built in a day, it was burnt down in considerably less time...

Seven months after it left Mars there has still been no radio communication with the Probe Seven spacecraft or the astronauts inside it. Back on Earth concern is mounting and eventually a recovery capsule is sent up to rescue the astronauts. But when the capsule returns to Earth it is found to be empty. As the Doctor and Liz investigate, they discover that the interior of the capsule is highly radioactive: if anyone was inside they would now surely be dead. Have the astronauts indeed returned to Earth? And if not, who are the sinister space-suited figures who stalk the countryside and whose very touch means instant death?

The TARDIS lands in Paris on 19 August 1572. Driven by scientific curiosity, the Doctor leaves Steven to meet and exchange views with the apothecary, Charles Preslin. Before he disappears, he warns Steven to stay out of 'mischief, religion and politics.' But in sixteenth-century Paris it is impossible to remain a mere observer, and Steven soon finds himself involved with a group of Huguenots. The Protestant minority of France is being threatened by the Catholic hierarchy, and danger stalks the Paris streets. As Steven tries to find his way back to the TARDIS he discovers that one of the main persecutors of the Huguenots appears to be - the Doctor.

In the far future a group of humans is living an idyllic existence on a distant planet. Their colony is run like a gigantic holiday camp and nothing seems to trouble their carefree existence. When one of them claims that the colony is being invaded by hideous monsters, no one takes him seriously. But the Doctor's suspicions are immediately aroused. What is the terrible menace that lurks at the heart of this apparent paradise? Why are the colonists unaware of the danger that lies before their very eyes? And what is the Macra Terror?

From his one previous visit the Doctor remembers the inhabitants of the planet Dido as a gentle, peace-loving people. But when he returns, things have changed dramatically. It seems that the Didoi have brutally massacred the crew of the crashed spaceliner Astra. Even now they are threatening the lives of the sole survivors, Bennett and the orphan girl Vicki. Why have the Didoi apparently turned against their peaceful natures? Can Bennett and Vicki survive until the rescue ship from Earth arrives? And who is the mysterious Koquillion?

The Time Lords have brought the Doctor to trial, accusing him of gross interference in the affairs of other planets. If he is found guilty he must forfeit all his remaining regenerations. In his defense the Doctor tells of an adventure set on board the Hyperion III space liner in his future. Answering a distress call, the Doctor and Mel arrive on the liner just as a series of grisly murders begins. Who is behind the murders? Do the enigmatic Mogarians have anything to do with them? Who sent the distress call to the TARDIS? And what hideous menace lies waiting in the Hydroponic Centre?

When the TARDIS materialises on an apparently deserted Northumbrian beach, Steven disputes the Doctor's claim that they have travelled back to the eleventh century. The discovery of a modern wristwatch in a nearby forest merely reinforces his opinion. But it is 1066, the most important date in English history, and the Doctor's arrival has not gone unnoticed. Observing the appearance of the TARDIS is a mysterious monk who recognises the time-machine for what it is. He also knows that the Doctor poses a serious threat to his master plan - a plan which, if successful, could alter the future of the entire world...

The TARDIS has been taken out of time and the Doctor has been brought before a court of his fellow Time Lords. There the sinister Valeyard accuses the Doctor of breaking Gallifrey's most important law and interfering in the affairs of other planets. If the Valeyard can prove him guilty, the Doctor must sacrifice his remaining regenerations. To prove his case the Valeyard focuses on an adventure set in the Doctor's past. It is an adventure set on the planet Ravolox, a seemingly primitive world but one which the Doctor and Peri find strangely familiar...

Assailed by violent bolts of multi-coloured energy, the TARDIS is blasted off-course and forced to land on the barren planet of Lakertya. The turbulence brings about the Doctor's sixth regeneration. But that is the least of his worries. He has been hijacked by that ruthless renegade Time Lady, the Rani. Why has the Rani brought the Doctor to Lakertya? What are the hideous Tetrap guards? Who are the eleven geniuses she has imprisoned in her stronghold? What is the vital significance of the asteroid of Strange Matter? And can the Doctor stop the Rani's diabolical scheme before it affects the whole of creation throughout time and space?

When the TARDIS lands on a deserted volcanic island the Doctor and his companions find themselves kidnapped by primitive sea-people. Taken into the bowels of the earth they discover they are in the lost kingdom of Atlantis. Offered as sacrifices to the fish-goddess, Amdo, the Doctor and his companions are rescued from the jaws of death by the famous scientist, Zaroff. But they are still not safe and nor are the people of Atlantis. For Zaroff has a plan, a plan that will make him the greatest scientist of all time - he will raise Atlantis above the waves - even if it means destroying the world...

When the TARDIS rematerialises inside a rocket the Doctor and Jamie are alarmed by the presence of a hostile Servo-Robot. They discover that the rocket is drifting in the orbit of a giant space station - the Wheel in Space. Once inside this magnificent space ship they are bewildered by its complexity and sheer size. The technicians and programmers are highly trained, but who are they working for? Suspecting the worst, the Doctor is still horrified to find the deadly Cybermen in control. What evil plan are they plotting? Who or what are the Cybermats? Can the Doctor trust anyone on board to help him stop the Wheel as it spins relentlessly through space?

Snatched out of time and place and brought before the Time Lords of Gallifrey, the Doctor is on trial for his life. While the Doctor asserts that the evidence of the Matrix, the repository of all Time Lord knowledge, has been tampered with, the mysterious and vengeful prosecuting council, the Valeyard, is confident that the Doctor will be sentenced to death. In a dramatic intervention the Valeyard's true identity is revealed but he escapes from the Courtroom into the Matrix, and it is into this nightmare world that the Doctor must follow - to face his ultimate foe...

In a final bid to regain control of the Tardis' faulty control system the Doctor is driven to experiment with a dangerous untried combination. With a violent explosion the TARDIS blacks out and the crew find themselves trapped inside. A simple technical fault? Sabotage? Or something even more sinister? Tension mounts as the Doctor and his companions begin to suspect one another. What has happened to the TARDIS? Slowly a terrifying suspicion dawns. Has the TARDIS become the prisoner of some powerful fifth intelligence which is even now haunting the time-machine's dark and gloomy corridors?

A 17th century Cornish town - villainous pirates roam the seas searching for treasure while the townspeople have turned to smuggling, wheeling and dealing in contraband. Into this wild and remote place the TARDIS materializes and the Doctor and his companions find themselves caught up in the dubious activities of the locals. When the Doctor is unwittingly given a clue to the whereabouts of the treasure the pirates are determined to extract the information - whatever the cost...

Much in need of a holiday, Mel and the Doctor head for Paradise Towers: a luxury man-made planet with sparkling fountains, sunny streets, exotic flowers and a shimmering blue swimming pool.

But when the TARDIS materialises in a dark, rubbish-filled, rat-infested alley it seems that this particular Paradise has turned into Hell!

Pursued by rogue cleaning machines, authoritarian caretakers and old ladies with strange eating habits, the Doctor and Mel track down the source of the chaos to one mysterious character - the designer of Paradise Towers, the Great Architect himself...

As the ten billionth customers at a space tollport the Doctor and Mel win the Grand Prize - a place on the Fabulous Fifties Coach Tour to Disneyland, Planet Earth. Unfortunately, they don't quite make it there... Knocked off-course by a wayward satellite the coach party arrives instead at Shangri-la, a remote Welsh holiday camp. But the peace and quiet of the countryside are soon shattered by the arrival of an army of marauding Bannermen soldiers, led by the ruthless Gavrok. They are tracking down Delta, the last of the Chimeron, with only one thought in mind - her destruction...

London, 1966 - when the TARDIS materialises outside the Post Office Tower the Doctor becomes aware of a powerful and evil force nearby, so he and the ever-curious Dodo set off to investigate.

Inside the tower they track down the source of power to Professor Brett and WOTAN, his revolutionary new computer.

Designed as a universal problem solver, WOTAN has suddenly begun to think for itself and has formulated a deadly plan. Using its phenomenal power it will programme humans to build mobile fighting computers, and with these indestructible war machines WOTAN will take over the world...

When the Doctor and Mel arrive in the Space Trading Colony, Iceworld, the Doctor can feel that there is mischief afoot. And he and Mel don't have to wait long before they discover the culprit, for there in the Refreshment Bar they meet up with that old intergalactic rogue, Sabalom Glitz. Glitz is hot on the trail of a hidden treasure and the Doctor, keen to do some scientific research, decides to join him. Down into the Ice Passages they go - through the Ice Garden, past the Singing Trees, beyond the Lake of Oblivion - in search of the Dragon's Treasure. But the Doctor and his companions don't know the true worth of this mythical hoard. Only Kane, the most feared man in Iceworld, knows the secret of the Dragonfire...

A diamond raid in modern-day London... a secret base hidden deep in the heart of the city's sewer system... a cold and desolate planet light years from Earth... and a daring plan to alter the entire course of interplanetary history... On twentieth-century Earth it appears that the Doctor's old enemy, Lytton, has allied himself with the ruthless Cybermen. The Cybermen have devised a scheme which, if successful, could completely destroy the web of time and bring the human race to its knees. When the Cyber-planet of Mondas was destroyed in 1986 the Cybermen were forced to retreat to the planet Telos. Now they have journeyed back in time to prevent the destruction of their home world. And for Mondas to survive, the Earth must die...

Accused of 'crimes against the inviolate laws of evolution', the Doctor is on trial for his life. The sinister prosecutor, the Valeyard, presents the High Council of Time Lords with the second piece of evidence against the Doctor: a dramatic adventure on the planet Thoros-Beta which led to the renegade Time Lord's summons to the Court of Enquiry. But as the Doctor watches the scenes on the Matrix he is puzzled by what he sees - his behaviour is not as he remembers. Only one thing is certain: on the evidence of the Matrix the Doctor is surely guilty as charged...

Through a Space-Time Visualiser the Doctor and his companions are horrified to see an execution squad of Daleks about to leave Skaro on a mission to find the TARDIS and exterminate the time travellers. Eluding the Daleks on the barren planet Aridius the Doctor and his friends escape in the TARDIS. But this is only the beginning of an epic journey. As they travel through space and time, they try to shake off their pursuers by making a series of random landings - but the Daleks don't give up easily. This is a chase to the death...

Stranded in the jungles of Kembel, the most hostile planet in the Galaxy, Space Security agent Marc Cory has stumbled across the most deadly plot ever hatched - the Daleks are about to invade and destroy the Universe. Cory has to get a warning back to Earth before it's too late - but the Daleks find him first. Months later the Doctor and his companions arrive on Kembel and find Cory's message. But it may already be too late for Earth - the Daleks' Masterplan has already begun…

The Daleks' Masterplan is well under way. With the Time Destroyer, the most deadly machine ever devised, they will conquer the Universe. Only one person stands in their way - the Doctor. For he has stolen the precious Taranium core which is vital to activate the machine. Travelling through Time and Space, the Doctor and his companions are forever on the move in case the Daleks track them down. But after several months, to their horror, the TARDIS indicates that they are being followed...

Launched into space 350 years ago, a meteor is returning to Earth - and inside it waits Nemesis, a silver statue made of the living metal validium, the most dangerous substance in the Universe. Evil powers await the statue's return: the neo-Nazi de Flores and his stormtroopers; Lady Peinforte, who saw Nemesis exiled in 1638 and has propelled herself forward in time; and the advance party of a Cyberman invasion force. And in the garden of a Windsor pub, the Doctor and Ace are enjoying the timeless sounds of a jazz quartet...

CREEPY. That's what Ace thinks of clowns. But the Doctor insists on entering the talent contest at the Psychic Circus, the self-proclaimed Greatest Show in the Galaxy, on the planet Segonax. What has reduced Segonax to an arid wasteland? Why have the happy-go-lucky circus folk stayed here so long? And why are they no longer happy? Above all, what is the dreadful truth about the "talent contests" run by the sinister Ringmaster and his robot clowns? The Doctor and Ace need all their death-defying skills in the big top to uncover a brooding, ancient evil that has broken the spirit of the Circus and demanded the sacrifice of so many lives.

The Doctor is feeling confident: this time the TARDIS has landed on Earth; in England; in 1963. But when he and his companions venture outside, they are soon lost in a maze of ravines and menaced by gigantic insects. And the insects are dying - every living thing is dying... Meanwhile, in a cottage garden on a perfect summer's day, the man from the Ministry arrives to put a stop to the production of DN6, a pesticide with the power to destroy all life-forms. But the men who invented DN6 will stop at nothing - not even murder - in their desire to see DN6 succeed. Can the one-inch-tall Doctor foil their plans?

I would also like to take this opportunity to squash the persistent rumours about mysterious "disappearances" and emphasize that rural and urban areas are now enjoying a life of harmony and peace. I'm sure you're glad to hear this. And I'm happy you're glad. Helen A, ruler of colony Terra Alpha, is determined that happiness will prevail. And if any killjoys insist on being miserable, the fun guns of the Happiness Patrol will remove them; or they will vanish into the Kandy Kitchen, where the Kandy Man will deal with them. When the Doctor and Ace spend a night in the dark streets of Terra Alpha they have to keep a smile on their faces - or else! - while making contact with the native Pipe People and trying to convince the colonists that they can have too much of a good thing - even sweets and happiness.

The charges detonate in a series of silent explosions, and space beacon Alpha One disintegrates into lumps of metal. The space pirates have discovered a new source of precious argonite... General Hermack of the Space Corps diverts his V-ship to investigate - and arrives in the Pliny system in time to witness the destruction of another beacon. Determined to trap the pirates, he leaves a squad of guards on beacon Alpha Four - and shortly afterwards, in the beacon's computer bay, the incongruous shape of a blue police telephone box materializes. Suspected by the Space Corps of being pirates, and then pursued as spies by the pirates themselves, the Doctor, Zoe and Jamie risk asphyxiation in the vacuum of space, execution and explosion in their attempts to unmask the mastermind behind the thefts of argonite.

Shoreditch, London, 1963. Two teachers follow an unnervingly knowledgeable schoolgirl to her home - a blue police telephone box in the middle of a scrapyard. The old man whom the girl calls 'grandfather' is annoyed at the intrusion: there is something he has to do, and he has a premonition that he will be delayed for some time... Six regenerations later the Doctor returns; and Ace, his travelling companion, sees London as it was before the Sixties started swinging - and long before she was born. But a Grey Dalek is lurking in Foreman's Yard; Imperial Daleks are appearing in the basement of Coal Hill School; and both factions want the Hand of Omega, the Remote Stellar Manipulator that the Doctor has left behind. Has the Doctor arrived in time to deprive the Daleks of the secret of time travel?

Perivale, 1983. A column of smoke rises from the blazing ruins of a forgotten, decaying mansion. Perivale, 1883. In the sleepy, rural parish of Greenford Parva, Gabriel Chase is by far the most imposing edifice. The villagers shun the grim house, but the owner, the reclusive and controversial naturalist Josiah Samuel Smith, receives occasional visitors. The Reverend Ernest Matthews, for instance, dean of Mortarhouse College, has travelled from Oxford to refute Smith's blasphemous theories of evolution. And in a deserted upstairs room, the Doctor and Ace venture from the TARDIS to explore the Victorian mansion... Who - or what - is Josiah Smith? What terrible secrets does his house conceal? And why does Ace find everything so frighteningly familiar?

'So what's so terrible about Perivale?' the Doctor asked as he caught up with her. Ace sighed again. 'Nothing ever happens here.' Ace had wanted her homecoming to be spectacular. She had imagined the amazed greetings of her old friends, the gasps of surprise as she recounted her time-travelling adventures. But Perivale on a summer Sunday seems the least lively place in the universe. The members of Ace's old gang have gone away - disappeared. The Doctor has other things on his mind. What is killing the domestic pets of Perivale? Who are the horsemen whose hoofprints scar the recreation ground? Where have the missing persons been taken? Is the Doctor stepping into a well-prepared trap? And if so, can it be the work of the Doctor's old adversary the Master? As Harvey the grocer said to his partner Len: 'I'm telling you, you put a catflap in and you get just anything coming into your house.' SURVIVAL was the last of the four adventures broadcast in the 1989 Doctor Who season on BBC television.