Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Brigadier summons the Doctor to Earth to help in the investigation, but it soon becomes clear some kind of alien presence is at work...

Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The aliens responsible, the Zygons, try to kill the Doctor and Sarah Jane, then attempt to recover their signal device using their ability to mimic human beings.

Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Doctor discovers a colony of shapeshifting Zygons and their cyborg weapon, the Skarasen, and in the process solves one of Scotland's greatest mysteries...

Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Doctor discovers a colony of shapeshifting Zygons and their cyborg weapon, the Skarasen, and in the process solves one of Scotland's greatest mysteries...

The edge of the known universe, in the year 37,166. The TARDIS lands on the planet Zeta Minor, where a Morestran survey team has suffered a series of horrific killings. What dark secret does the team leader keep - and will the planet permit anyone to leave?

The edge of the known universe, in the year 37,166. The Morestran crew believe the Doctor and Sarah Jane are responsible for the deaths of their personnel, but the Doctor warns that a greater danger threatens them and all the galaxy.

The edge of the known universe, in the year 37,166. The TARDIS lands on the planet Zeta Minor, where a Morestran survey team has suffered a series of horrific killings. What dark secret does the team leader keep - and will the planet permit anyone to leave?

The edge of the known universe, in the year 37,166. The TARDIS lands on the planet Zeta Minor, where a Morestran survey team has suffered a series of horrific killings. What dark secret does the team leader keep - and will the planet permit anyone to leave?

England, 1911. The TARDIS is drawn off-course and lands in the country house of archaeologist Marcus Scarman. But what did Scarman unearth on his last visit to Egypt, and how can the Doctor defeat his most powerful foe yet - Sutekh, the God of Destruction?

England, 1911. The TARDIS is drawn off-course and lands in the country house of archaeologist Marcus Scarman. But what did Scarman unearth on his last visit to Egypt, and how can the Doctor defeat his most powerful foe yet - Sutekh, the God of Destruction?

England, 1911. The TARDIS is drawn off-course and lands in the country house of archaeologist Marcus Scarman. But what did Scarman unearth on his last visit to Egypt, and how can the Doctor defeat his most powerful foe yet - Sutekh, the God of Destruction?

England, 1911. The TARDIS is drawn off-course and lands in the country house of archaeologist Marcus Scarman. But what did Scarman unearth on his last visit to Egypt, and how can the Doctor defeat his most powerful foe yet - Sutekh, the God of Destruction?

England, the near future... perhaps. The TARDIS lands in the woods near Devesham Space Centre, and mysteries abound: soldiers rise from the grave, men lost in deep space are alive and well, and the entire population behaves very oddly indeed. What has happened to Earth - or is the true threat yet to come?

England, the near future... perhaps. The TARDIS lands in the woods near Devesham Space Centre, and mysteries abound: soldiers rise from the grave, men lost in deep space are alive and well, and the entire population behaves very oddly indeed. What has happened to Earth - or is the true threat yet to come?

England, the near future... perhaps. The TARDIS lands in the woods near Devesham Space Centre, and mysteries abound: soldiers rise from the grave, men lost in deep space are alive and well, and the entire population behaves very oddly indeed. What has happened to Earth - or is the true threat yet to come?

England, the near future... perhaps. The TARDIS lands in the woods near Devesham Space Centre, and mysteries abound: soldiers rise from the grave, men lost in deep space are alive and well, and the entire population behaves very oddly indeed. What has happened to Earth - or is the true threat yet to come?

The storm-lashed planet Karn. Near a graveyard of crashed starships, the demented surgeon Solon hides in his castle, the last acolyte of the Time Lord despot Morbius. He only needs one final item to make his master live again... and then the Doctor and Sarah arrive...

The Doctor is captured by the Sisterhood, and Sarah Jane is blinded freeing him. The Doctor has no choice but to go back for a cure, unaware that he is leaving Sarah Jane in the hands of a treacherous Dr. Solon and the renegade Time Lord Morbius.

While the Doctor goes to confront the Sisterhood to seek a cure for Sarah Jane's blindness, Solon realizes that he must transfer Morbius' brain into a new body before it is too late.

Morbius lives once more, but as a rampaging beast. The Doctor is forced to ally with Dr. Solon to bring him to heel, but the two disagree about what should happen to Morbius.

The Antarctic, the near future. A strange seed-pod is unearthed from 20-thousand-year-old ice. The Doctor and Sarah go to investigate, but are too late to prevent the pod infecting a scientist and unleashing a threat to all animal life on Earth...

Two employees of the millionnaire Harrison Chase arrive at the Antarctic base, and they will stop at nothing to get hold of the second seed-pod.

England: The 20th Century. After they return from England after their Antarctic ordeal, Chase tries to eliminate the Doctor and Sarah Jane, but they escape and track him down at his estate, where he is preparing to open the Krynoid pod.

England: The 20th century. The Doctor is captured by Chase, who plans to breed the stolen Krynoid pod. The Doctor is placed in an automated compost hopper and only Sarah Jane can save him...but will she make it before the Krynoid grows to fruition?

England, the near future. The Krynoid grows to monstrous size and traps the Doctor and the others in a cottage. The creature demands they turn over the Doctor, while Chase seeks to make an alliance with the alien vegetation.

England, the near future. The Doctor, Sarah Jane, and Scorby are trapped in the manor as a possessed Chase stalks them from within, while the gigantic Krynoid prepares to crush them from without. Worse, the alien plant is ready to germinate, spreading its seeds across England.