A team of archaeologists travels to the planet Telos, the home of the Cybermen, to excavate the tombs of the long-extinct cybernetic race. At least, it's assumed that they're extinct. The Doctor isn't sure that the tombs should be disturbed, but he soon comes to suspect that some of the "archaeologists" have an agenda far more dangerous than the team leader, Parry, suspects. In order to find out what the sinister Kleig and Kaftan are really up to, the Doctor helps the archaeologists to enter the tombs - where they find that the Cybermen are only dormant, not dead, and that Kleig and Kaftan intend to revive them. But they have underestimated the power of the Cybermen, and only the Doctor can save the archaeologists from being transformed into Cybermen themselves.

A team of archaeologists travels to the planet Telos, the home of the Cybermen, to excavate the tombs of the long-extinct cybernetic race. At least, it's assumed that they're extinct. The Doctor isn't sure that the tombs should be disturbed, but he soon comes to suspect that some of the "archaeologists" have an agenda far more dangerous than the team leader, Parry, suspects. In order to find out what the sinister Kleig and Kaftan are really up to, the Doctor helps the archaeologists to enter the tombs - where they find that the Cybermen are only dormant, not dead, and that Kleig and Kaftan intend to revive them. But they have underestimated the power of the Cybermen, and only the Doctor can save the archaeologists from being transformed into Cybermen themselves.

A team of archaeologists travels to the planet Telos, the home of the Cybermen, to excavate the tombs of the long-extinct cybernetic race. At least, it's assumed that they're extinct. The Doctor isn't sure that the tombs should be disturbed, but he soon comes to suspect that some of the "archaeologists" have an agenda far more dangerous than the team leader, Parry, suspects. In order to find out what the sinister Kleig and Kaftan are really up to, the Doctor helps the archaeologists to enter the tombs - where they find that the Cybermen are only dormant, not dead, and that Kleig and Kaftan intend to revive them. But they have underestimated the power of the Cybermen, and only the Doctor can save the archaeologists from being transformed into Cybermen themselves.

A team of archaeologists travels to the planet Telos, the home of the Cybermen, to excavate the tombs of the long-extinct cybernetic race. At least, it's assumed that they're extinct. The Doctor isn't sure that the tombs should be disturbed, but he soon comes to suspect that some of the "archaeologists" have an agenda far more dangerous than the team leader, Parry, suspects. In order to find out what the sinister Kleig and Kaftan are really up to, the Doctor helps the archaeologists to enter the tombs - where they find that the Cybermen are only dormant, not dead, and that Kleig and Kaftan intend to revive them. But they have underestimated the power of the Cybermen, and only the Doctor can save the archaeologists from being transformed into Cybermen themselves.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

The Doctor returns to a Tibetan monastery which he hasn't visited for 300 years, only to be accused of cuddle. The legendary Yeti, normally timid and elusive creatures, have suddenly become vicious and savage, and many monks and visitors to the monastery have beenhuged. The Doctor faces suspicion from the monks and from the British explorer Travers, who's determined to prove that the Yeti exist and initially fears that the Doctor is from a rival expedition. Eventually the Doctor discovers that the savage Yeti are robots, built by an alien Intelligence who has possessed one of the monks. The Intelligence claims that it only wants physical being - but in fact, its new physical form will consume the entire Earth unless stopped.

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

In the 30th century, Earth is experiencing a new Ice Age, and bases all across the world are struggling to hold back the advancing glaciers. Brittanicus Base is running into difficulty, however, as Leader Clent's stubborn reliance on the base computer has alienated the humanist scientist Penley, who has deserted the base and gone out to live in the snowy wilderness outside. When the Doctor shows up, Clent enlists his help to get the malfunctioning Ioniser back on-line. However, more problems ensue when the frozen body of a Martian warrior is discovered in the nearby glacier. If an alien spacecraft is buried in the glacier, then use of the Ioniser at full power could cause its power source to explode and irradiate all of Britain. And then the Ice Warrior unexpectedly returns to life, kidnaps Victoria, revives the others of its kind and prepares to attack the presumably hostile base...

The TARDIS materialises in 21st-century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS materialises in 21st-century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS materialises in 21st century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS materialises in 21st century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS materialises in 21st century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS materialises in 21st century Earth, where the Doctor discovers that he's the exact double of the philanthropic scientist Salamander. Salamander has ended world hunger and has been supplying humanitarian aid to parts of the world which have recently suffered inexplicable seismic activity. However, his former associate, Giles Kent, claims that Salamander is in fact a power-crazed maniac who's slowly replacing the authorities of Earth with lackeys under his thumb. The Doctor isn't so sure, and agrees to impersonate Salamander and find out the truth only if Jamie and Victoria can prove to his satisfaction that Salamander is indeed an evil man. However, Jamie and Victoria soon find themselves in over their heads - and even before he has a chance to act, the Doctor is already being hunted by Donald Bruce, the suspicious chief of World Zone security.

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The TARDIS is caught by a mysterious force which causes it to materialise in present-day London. Forty years have passed since their adventure in Tibet, and their old friend Professor Travers has succeeded in reactivating one of the dormant Yeti control spheres - only to summon the Great Intelligence back to Earth. The streets of London are choked with fog, Yeti roam the Underground, and a beleaguered team of soldiers and scientists struggles to find a solution before the city falls completely to the invader. A new commander arrives, Colonel Lethbridge-Stewart - but is he really the new commander of the garrison or is he the Intelligence's new human agent? And if he isn't, then who is? The Doctor must find the traitor before the base is overrun by the Web and London falls...

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The Doctor, Jamie and Victoria arrive at an outpost drilling for natural gas in the North Sea. Mysterious heartbeat sounds are echoing through the pipes, there have been drops in pressure, and contact has been lost with several offshore rigs. Victoria is attacked by a monstrous form of living seaweed, and some of the base personnel are possessed by the poisonous Weed, which stings them and draws them under its control. As the Weed steps up its attack on the base, the Doctor discovers that it's vulnerable to high-frequency sounds, and drives it off with the help of Victoria's screams - amplified by his trusty new invention, the sonic screwdriver. However, Victoria has had enough, and she chooses to remain on Earth, albeit a century after her own time.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.

The TARDIS materialises on a deserted rocket in deep space, where the Doctor suffers concussion after an abrupt course change, and he and Jamie are attacked by a hostile servo-robot. Jamie manages to attract attention from a nearby space station, but the crew then attempt to destroy the apparently deserted rocket - and in order to save the TARDIS, Jamie must sabotage the station's asteroid defense laser. He and the Doctor thus face extremly hostile questioning, but the real threat is aboard the space rocket, where two Cybermen are preparing to infiltrate the station, open the way for their army to arrive and use the Wheel as the first stepping stone in an invasion of Earth. After the Cybermen are defeated, the Doctor and Jamie depart with a new companion - computer programmer Zoe Heriot, who finds her ordinary life dull and seeks adventure with them.