A documentary celebrating the 30th anniversary of Doctor Who, featuring new interviews, rare archive footage and recently discovered material.

A rare Dennis Potter play from the BBC Archives - (timecoded)

Retired commander of the United Nations' Intelligence Taskforce, and long-time associate of the mysterious time traveler the Doctor, Brigadier Alistair Lethbridge-Stewart faces the toughest battle of his military career when he is embroiled in a plot unwittingly set in motion by university chancellor Victoria Waterfield, herself a former companion of the Doctor, to take over the Earth by an evil alien entity called the Great Intelligence, aided by its ferocious robot Yeti cohorts. Can the Brigadier defeat this menace to the Earth without the Doctor's help?

The TARDIS arrives on the planet Telos where an Earth archaeological expedition, led by Professor Parry, is attempting to uncover the lost tombs of the Cybermen. With a lot of help from the Doctor the archaeologists enter the tombs. There, one of the party, Klieg, reveals himself and his business partner, Kaftan, to be planning to revive the Cybermen. He wants to use their strength, allied with the intelligence of his own Brotherhood of Logicians, to create an invincible force for conquest. It transpires however that the tomb is actually a giant trap designed to lure humans suitable for conversion into further Cybermen - a fate that almost befalls Kaftan's assistant Toberman. After fending off an attack by Cybermats - small but dangerous cybernetic creatures - the Doctor eventually defeats the revived Cybermen, led by their Controller, and reseals the tombs. The Controller is apparently destroyed in the process.