Sixth Doctor Colin Baker looks back at the black and white era of the Cybermen with interviews, clips and four episodes - The Moonbase: 2 & 4 and The Wheel in Space: 3 & 6.

The Doctor discovers Polly and Ben aboard the TARDIS shortly before the ship arrives in 17th century Cornwall, where the local churchwarden gives the Doctor a cryptic message shortly before being murdered.

Pike is convinced that the Doctor knows the location of Avery's treasure while Polly and Ben try to convince the locals they were not responsible for Longfoot's murder.

Polly and Ben are placed in the custody of Blake, who reveals he also has his suspicions about the Squire, while the Doctor and Kewper are forced to team up to escape from Pike's ship.

The Doctor and his friends are at the mercy of Cherub, who is now seeking Avery's treasure for himself, while Pike prepares to attack the village.

In 1986 a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.

The Doctor's warnings are ignored and the Cybermen take over the base, hampering the crew's efforts to help Zeus IV.

With the Doctor out of action, it is up to Polly, Ben and Barclay to stop Cutler using the Z-Bomb and devastating half the world.

The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.

The TARDIS arrives on the Earth colony of Vulcan where the newly-regenerated Doctor assumes the identity of an Earth Examiner.

While the Doctor worries about the inert Daleks in the capsules, Lesterson makes plan to reactivate one of them.

The Doctor fails to convince the colonists of the danger posed by the Daleks and soon the other two are also reactivated.

With Polly being held prisoner by the rebels, the Doctor and Ben decide to investigate them, while Lesterson discovers the Daleks are reproducing.

The Doctor and Quinn attempt to escape in order to stop Bragen using the Daleks to take over the colony.

With Bragen having taken over, the Daleks trick the rebels into turning them loose and only the Doctor can stop them wiping out the entire colony.

The Doctor, Polly and Ben arrive in 1746, in the aftermath of the Battle of Culloden, and are captured by a group of Highlanders shortly before they themselves are captured by redcoats.

Polly and Kirsty capture Lieutenant Ffinch to try and enlist his help while the Doctor tricks Grey in order to escape.

With the Highlanders imprisoned aboard Trask's ship, the Doctor attempts to expose Grey's plan.

Ben manages to join up with the Doctor, Polly and Kirsty and together they work to free the Highlanders from Trask's ship before Grey sells them into slavery.

The TARDIS materialises on a deserted beach where the Doctor and his friends are captured by primitive warriors and taken to the fabled city of Atlantis.

While Ara tries to save Polly from being turned into a Fish Person and Ben and Jamie try to escape from the mines, the Doctor discovers the full extent of Zaroff's plans.

The Doctor and Ramo are sentenced to be sacrificed to the goddess Amdo and must escape to put a stop to Zaroff's plan.

With Zaroff's plan nearing completion, the Doctor and Ben realise the only way to save the world is to destroy Atlantis.

The TARDIS arrives on the Moon in the year 2070.When Jamie is injured, the other travellers are forced to seek the help of a moonbase afflicted with a space plague.

The Doctor and his friends attempt to convince the Moonbase crew that the Cybermen are responsible for the disappearances and find a cure for the plague.

The Cybermen take over the Moonbase and begin using the Gravitron to attack Earth but Polly, Ben and Jamie come up with a way to fight back.

With the Cybermen preparing to launch a full attack, the Doctor and his friends must keep the Moonbase and the Gravitron out of their hands until help arrives from Earth.

The TARDIS arrives at a holiday camp company with the crew worried by a prediction of giant crabs and the Doctor becomes interested in the apparent madman Medok's stories of creatures that roam the colony at night.

The Doctor is unable to convince the colonists that the Macra exist and an attempt to brainwash his companions results in Ben betraying his friends.

The Doctor, Polly and Jamie are sentenced to work in the pits and an escape attempt sees Ben's loyalties called into question again.

The Doctor and Polly manage to save Jamie from the Macra and then try to show the Pilot who is really in charge of the colony.

The TARDIS materialises on the runway of Gatwick Airport, where Polly witnesses a murder only to be kidnapped before she can report it.

With Polly having apparently forgotten them, the Doctor, Ben and Jamie decide to carry out their own investigation of Chameleon Tours.

The Doctor, Jamie and Sam manage to convince Crossland to trust them and he persuades the Commandant to let them continue their investigation.

When Spencer attempts to kill them, the Doctor, Jamie and Sam become convinced Chameleon Tours are hiding something and Sam decides to book a ticket on one of their flights.

Jamie finds himself aboard the Chameleons' satellite and meets their Director while the Doctor forces the Chameleon Meadows to tell him the aliens' plans.

The Doctor and Pinto are captured by the Chameleons but the Doctor manages to use their dependence on their human originals to create dissent in their ranks.

Trying to find the stolen TARDIS, the Second Doctor and Jamie are lured into a trap by the Doctor's old enemies the Daleks.

The Doctor and Jamie investigate Waterfield's antiques shop, where they are knocked unconscious and transported back to the 19th century.

As part of the Daleks' experiment, the Doctor manipulates Jamie into attempting to rescue Victoria.

Jamie and Kemel team up to try and find Victoria, while the Doctor and the Daleks continue to monitor their progress.

With the experiment at an end, the Doctor begins to suspect the key to rescuing Jamie, Victoria and Kemel from the Daleks lies with Terrall.

The Doctor, Jamie and Waterfield follow the Daleks to Skaro, where they discover an unforeseen consequence to their experiment.

The Daleks are poised to spread the Dalek Factor throughout the history of Earth and begin by implanting the Doctor.

The Doctor, Jamie and Victoria arrive on Telos, where an archaeological group are exploring the Tomb of the Cybermen. But are the Cybermen as dormant as they believe?

The archaeologists learn they are stranded on Telos and Klieg suggests they use the opportunity to explore the Cybermen's tombs.

The Cybermen have been revived and plan to convert the archeologists into their own kind, prompting Hopper to attempt a rescue.

Klieg attempts to do a deal with the Cybercontroller while the Doctor tries to find a way to refreeze the Cybermen permanently.

When the TARDIS materialises in the Himalayas, the Doctor decides to pay a return visit to the nearby Det-Sen monastery only to be accused of murder.

Jamie and Victoria make their way to the monastery shortly before it is attacked by the Yeti.

While the Doctor and Jamie return to the TARDIS for equipment, the control sphere Jamie brought to the monastery is reactivated.

The Yeti escapes from the monastery and Victoria and Thonmi are accused of assisting it, while the Doctor and Jamie endure a perilous journey back across the mountains.

Victoria falls under the mental influence of Padmasambhva as the Yeti attack in order to drive the monks from the area.

With the Great Intelligence on the verge of becoming corporeal, the Doctor challenges Padmasambhva to a mental battle in order to defeat it.

The Doctor, Jamie and Victoria are brought to a base which is attempting to halt the flow of the Second Ice Age.

Varga revives and takes Victoria hostage as he works to revive his crew while the Doctor and Jamie find Penley stealing medical supplies.

Jamie and Arden venture out to rescue Victoria only to find the rest of the Ice Warriors are now active.

The Doctor leaves the base to try and find Jamie and Victoria while Storr tries to do a deal with the Ice Warriors.

The Doctor and Victoria are both held prisoner by the Ice Warriors as Varga decides to take over Brittanicus.

The Doctor and Victoria attempt to force the Ice Warriors to surrender control of the ioniser before the ice flow destroys them.

After the Doctor is attacked by a group of mysterious gunmen, he discovers he is the physical double of the famous scientist Salamander.

Jamie and Victoria agree to accompany Astrid to Hungary to observe Salamander's activities.

Jamie and Victoria join Astrid into attempting to rescue Denes but Salamander becomes suspicious of them.

Fariah brings the Doctor and Kent evidence of Salamander's activities but then they come under attack from Benik.

The Doctor persuades Bruce to help him infiltrate Salamander's research centre while Salamander takes drastic action to prevent Swann finding out the truth.

The Doctor discovers the true link between Salamander and Kent while Astrid tries to convince the shelter inhabitants they have been lied to.

The TARDIS becomes trapped in space before ending up in an underground station of a mysteriously deserted London.

Jamie and Victoria are reunited with Travers before Jamie joins the soldiers in attempting to find out what has happened to the Doctor.

The Doctor and Victoria are taken back to the Goodge Street base by Colonel Lethbridge-Stewart where the Doctor becomes convinced there is a traitor in their midst.

With Travers having been captured by the Yeti, the Doctor attempts to find a way to gain control of the robots while Lethbridge-Stewart tries to recover the TARDIS.

Victoria and Travers are held prisoner by the Great Intelligence, who is planning to drain the Doctor's mind.

The Doctor and his friends are held prisoner by the Intelligence and their only hope lies with Jamie, Arnold and a reprogrammed Yeti.

The Doctor, Jamie and Victoria are taken prisoner by the staff of a gas refinery, who have lost contact with their drilling rigs and experienced mysterious drops in pressure.

Harris asks for the Doctor's help with Maggie, while Van Lutyens and the Chief Engineer attempt to find out what is blocking the impeller.

While the Doctor begins his investigation into the weed creatures, Robson is attacked by one at the refinery.

Van Lutyens' investigation of the base of the impeller places the Doctor and Jamie in danger from the Weed Creature.

With the Weed Creature poised to burst out of the pipeline and attack the base, an encounter with Oak and Quill gives the Doctor a vital clue about its weakness.

The Doctor and Jamie rescue Victoria from Robson and realise they can destroy the Weed Creature with sound waves.

The Doctor and Jamie arrive on a mysterious spacecraft whose only occupant is a dangerous Servo Robot.

The Doctor and Jamie are brought aboard the Wheel where Jamie is horrified to learn the crew plan to destroy the Silver Carrier with the TARDIS on board.

Jamie sabotages the Wheel's x-ray laser, unknowingly giving the Cybermen an opportunity to reach the Wheel.

The Cybermen instruct their human slaves to smuggle them onto the Wheel while the Doctor attempts to convince Bennett of the threat they pose.

The Cybermen gain control of more members of the Wheel crew and the Doctor realises the only way to stop them is for Jamie and Zoe to make a dangerous space walk.

Jamie and Zoe attempt to recover the time vector generator while the Cybermen realise the Doctor is on the Wheel and make him their prime target.