The Moonbase is the half-missing sixth serial of the fourth season in the British science fiction television series Doctor Who, which was first broadcast in four weekly parts from 11 February to 4 March 1967. In this serial, the Second Doctor (Patrick Troughton) and his travelling companions Ben (Michael Craze), Polly (Anneke Wills) and Jamie McCrimmon (Frazer Hines) arrive on the Human colonised Moon in 2070, where the Cybermen plot to take over the base and use it to invade the Earth. This story features the return, and first redesign, of the Cybermen. It was the fifth incomplete Doctor Who serial to be released with full-length animated reconstructions of its two missing episodes. Plot The TARDIS lands on the Moon in the year 2070; dressed in spacesuits, the Second Doctor and his companions Ben, Polly and Jamie venture outside to explore the low-gravity environment. While they play, Jamie is injured. Some workers from the nearby Moonbase find Jamie and bring him inside for treatment while the remaining TARDIS crew follows. The time travellers learn that the Moonbase uses a machine called the Graviton to track and manage weather on Earth. Their arrival is ill-timed, as members of the international crew, led by the bullish Hobson, have begun to collapse under the influence of an unknown pathogen. While International Space Control quarantines the Moonbase, the Doctor starts to investigate. Before he dies, the station's patient zero – their staff doctor, Evans – rants about a "silver hand". Another crew member, Ralph, then vanishes in the food stores, and the crew learn that their radio transmissions are being monitored from elsewhere on the Moon. In the sickbay a feverish Jamie begins to rant about a "Phantom Piper", a figure said to appear to a McCrimmon before death. While attending to Jamie, Polly sees a large figure leave through the door. When Hobson, the Doctor, Ben, John and Nils arrive to collect Evans' body, it has disappeared. They then leave to investigate where this 'piper' is. Polly goes to get water, and Jamie wakes up to see the 'piper' advancing on him. The 'piper' ignores Jamie, as he doesn't have the disease, so he steals another patient and leaves. Polly comes back in just as the figure is leaving and recognises it as a Cyberman, and the Doctor realises their old enemies are taking the patients' bodies. Hobson brushes away the cyber-story, believing