The harsh British winter of 1963 brings a big freeze that extends into April with no sign of letting up. And with it comes a new, far greater menace: terrifying icy creatures are stalking the streets, bringing death and destruction.

The First Doctor and Susan, trapped on Earth until the faulty TARDIS can be repaired, are caught up in the crisis. The Doctor seems to know what is going on, but is uncharacteristically detached and furtive, almost as if he is losing his memory...

Susan, isolated from her grandfather and finding it hard to fit in with the human teenagers at Coal Hill School, tries to cope by recording her thoughts in a diary. But she too feels her memory slipping away and her past unravelling. Is she even sure who she is any more...?

In the city-state of Hokesh, time plays tricks; the present is unreliable, the future impossible to intimate. A derelict street child, Joey Quine, finds himself subject to horrifying visions and fugues. His only friend in this, the only one to whom he can turn for help, is a mysterious stranger who calls herself Ace.

And in an unknowable future the Doctor is busily inciting a state of bloody unrest, on the basis that one must be cruel to be kind -- simultaneously, for preference. The Glorious Ruler of the city, Magnus Solaris, is worried: his memory is failing him; his influence deserting him; his city is falling apart. What is happening to him truly? Only the Doctor knows -- and he’s not telling.

There is worse to come. As both world and time crumble, Magnus Solaris and Joey Quine will unearth secrets the like of which nobody in Hokesh could have ever possibly suspected.

Perihelion Night on the wooded moon Verd. A time of strange sightings, ghosts, and celebration before the morn, when Lord Esnic marries the beautiful Lady Ria. However Ria has other ideas, and flees through the gravity wells which dot the moon to meet with her true love Tonio. When the Doctor and Jo arrive on Verd, drawn down by the fluctuating gravity, they find themselves involved in the unpredictable events of Perihelion.

But what of the mysterious and terrifying Nightdreamers?

And of the Nightdreamer King?

Perhaps sensing the Doctor's deepening mood of introspective melancholy, the TARDIS lands in the most haunted place on Earth, the luxury ocean liner the Queen Mary on its way from Southampton to New York in the year 1963.

But why do ghosts from the past, the present and, perhaps even the future, seek out the Doctor? What appalling secret is hidden in Cabin 672?

And will the Doctor be able to preserve his sanity as he struggles to save the lives of the passengers against mighty forces which even he does not fully understand?

China, 1800, and the Doctor, Jamie and Zoe arrive at the English Trade Concession in Canton.

A supposedly harmless relic known as the Spirit Gate becomes active and whisks Jamie and Zoe into the future. The Doctor follows in the TARDIS and arrives in England, 1900, where the descendents of an English merchant from 1800 are gathering.

Among their number is a young man called Carnacki, an expert in all things mystical, and before long he is helping the Doctor investigate a series of bizarre murders in the house.

The spirits of the past have returned, and when the Doctor discovers that the house and surrounds have literally been taken out of space and time, he realises that their attacker may not be all they seem.

Unsettling things are afoot in a sleepy Cornish village. Strangers are hanging about the harbour and a mysterious object is retrieved from the sea bed. Then the locals start getting sick.

Could this have anything to do with the alluringly beautiful Ruth who local lifeboatman Steve has taken a shine to ... or could the other stranger, a man calling himself the Doctor, be somehow involved? And why is Ruth both drawn and terrified by the sea?

The Doctor is perhaps the only person who can help, but can he discover the truth in time?

San Francisco 1967. A place of love and peace as the hippy movement is in full swing and everyone is looking forward to the ultimate festival: the human be-in.

Summer, however, has lost her boyfriend, and fears him dead, destroyed by a new type of drug nicknamed Blue Moonbeam. Her only friends are three English tourists: Ben and Polly, and their mysterious guardian and friend the Doctor.

But will any of them help Summer, and what is the strange threat posed by the Blue Moonbeams?

The Doctor is washed up - literally - on an alien beach with only intelligent crabs and a madman for company.

How can he possibly rescue Peri who was lost at sea the same time as he and the TARDIS? But Peri has problems of her own. "Rescued" from drowning by an intelligent sponge growth, she has been adopted by the life form as its own personal God.

As the denizens of the beach come under increasingly vicious attack, the Doctor must discover the truth in time to save all their lives.

Where is the Doctor? Everyone is hunting him.

Honoré Lechasseur, a time sensitive "fixer", is hired by mystery woman Emily Blandish to find him. Lechasseur discovers that the Doctor is, in fact, a semi-mythical figure who has appeared off and on throughout Earth's history. But what is his connection with London in 1949? And why is a mysterious group seeking "the cabinet of light" - a device somehow connected with the Doctor.

Lechasseur is about to discover that following in the Doctor's footsteps can be a difficult task.

In ancient Akrotiri, a young girl is learning mysteries from a tutor, who, quite literally, fell from the skies.

With his encouragement she can fly and surf the timestreams and see something of the future. But then the demons come.

Death and disaster are meted out by the Gods of her land. Perhaps retribution for some heinous crime... or something far more sinister?

"I like to stare into the sun, eyes wide.  It burns incredible colours into my head, great shifting continents of them that blot out all else.  And I try to keep looking until I imagine all the pretty blue has boiled away from my eyes and they are left a bright, bloody red and quite sightless."

On a blasted world, the Doctor and Susan find themselves in the middle of a war they cannot understand.  With Susan missing and the Doctor captured, who will save the people from the enemies from both outside and within.

Inhabiting a colony spaceship in the thirty second century are members of a religious cult which left Earth to find a world of their own. Their leader, Seraph, has downloaded his mind into the ship's computers, but now he has gone silent, enticed and serenaded by a siren song coming from inside a black hole.

Escaping from one battle and straight into another, the Doctor and his companion, Catherine, find themselves on a far flung world where time travellers are persecuted as witches and warlocks by the Papal Inquisition.

The American Civil War … a time of great unrest, when fathers found themselves in conflict with their sons and when lawlessness and slavery were rife.

The Doctor, together with his companions Peri and Erimem, arrive in the middle of the conflict. The Doctor manages to cope in his own inimitable manner, however Peri – an American – and Erimem – a dark-skinned Egyptian – find themselves faced with all the bigotry and hatred that typified the war for some.

Featuring the Fifth Doctor, Peri and Erimem.

When a Thal platoon arrive on a hostile planet investigating reports that Dalek artefacts have been detected, they are unprepared for what they find. In an underground room is a stranger, a Professor, or so he claims, with no memory of who he is or why he is there.

With death and horror their only companions, the Thals make their way with the Professor into the heart of a crumbling Dalek citadel in search of answers … only to find that the Daleks are the least of the horrors they must face.