Plot
The Prion star system contains two habitable planets which have supported civilisations: Zolfa-Thura, a desert world devoid seemingly of life structures bar five giant screens; and Tigella, a jungle world inhabited by the humanoid, white haired Tigellans. The structure of Tigellan society is based on two castes: the scientific Savants, led by the earnest Deedrix, and the religiously fanatical Deons, led by Lexa. The latter worship the Dodecahedron, a mysterious twelve-sided crystal which they see as a gift from the god Ti. The Savants, however, have utilised its power as an energy source for their entire civilisation. The planet’s leader, Zastor, mediates between the two factions, whose tensions have grown greater as the energy source has begun to fluctuate. When Zastor’s old friend the Doctor gets in touch, the weary leader invites him back to Tigella to investigate and help. When the Fourth Doctor, Romana, and K9 try to land the TARDIS on Tigella they are trapped in a time loop (which they call a chronic hysteresis), causing them to repeat a small "pocket of time" over and over again. The culprit is Meglos, the last Zolfa-Thuran, a cactus creature who has remained hidden below the surface of his planet in a secret structure. He has summoned a band of space pirates called Gaztaks to help him in an audacious plan. Meglos wants to steal the Dodecahedron back from Tigella, as it is a Zolfa-Thuran energy source of immense power. To aid him, Meglos uses an Earthling captured for him by the Gaztaks to occupy and take on humanoid form: and the humanoid form he chooses is the Doctor, whom he has trapped in the bubble. While the hysteresis persists Meglos gets the Gaztaks to take him to Tigella, and infiltrates the city in his new identity. Zastor greets “the Doctor” warmly as an old friend, asking him to examine the Dodecahedron, but others are less sure, especially Lexa. The Doctor and Romana break out of the loop by throwing it out of phase, and then land on Tigella in the middle of the hostile jungle. As the Doctor heads off to find Zastor, Romana stumbles across dangerous vegetation – deadly bell plants – and then the Gaztaks, waiting patiently for Meglos to return to their spaceship. She gives them the slip after a while and heads off to the city. Meglos has used his time as the Doctor to steal the Dodecahedron, shrinking it to minute size. However, the Earthling fights back against his occupation, causing green cactus spikes to break out on his skin. When the Tigellans discover that the Dodecahedron is missing and sound the alarm, Meglos hides away, but the real Doctor arrives at the same time and is accused of theft. His bewilderment and charm are little defence as both Savants and Deons start to panic as the energy levels of the city start to fail. Lexa uses the situation to her own ends. Zastor and Deedrix are arrested in a Deon coup, with other Savants expelled to the hostile surface of the planet, while the Doctor himself is prepared for sacrifice to Ti. The doors of the city are sealed with Meglos trapped inside, with a hostage Savant named Caris for company. She soon gets the upper hand when the Earthling tries another bout of resistance. In a subsequent mix-up, Romana overpowers Caris, letting Meglos escape and reunite with the Gaztaks, who have staged an attack on the city to rescue him. With the miniaturized Dodecahedron in his possession, the pirates blast off back to Zolfa-Thura – though three Gaztaks, half the crew, have been lost. The real Doctor has by now been able to prove that he did not steal the artefact and that there is aProduction
Working titles for this story included ''The Golden Pentangle'' and ''The Last Zolfa-Thuran''. This is one of only two multi-part stories to feature all credited cast members in every episode, the other being '' The Edge of Destruction'' (1964). This story features the only use in ''Doctor Who'' of a camera-linking system known as Scene-Sync that allowed the use of non-static shots of characters superimposed onto a miniature set. As the cameras on the actors were moved, the cameras on the miniature set moved the equivalent scaled amount automatically. The exact scale motion was achieved by trial and error, involving minute adjustments to the voltage delivered to the slave camera's motors. Part Four's closing theme was transposed to the lower key of the original theme music. During production of this story,Cast notes
Jacqueline Hill, who played the First Doctor'sCommercial releases
In print
Terrance Dicks' novelisation was published by Target Books in February 1983. Dicks names Meglos' unfortunate human host and bookends the novel with his kidnapping and subsequent return to Earth. A French translation was published in 1987. An audiobook of the Target novelisation was released by BBC Audio on 1 July 2021 read by Jon Culshaw and John Leeson.Home media
''Meglos'' was released on VHS in April 2003, on DVD in January 2011, and as part of the Doctor Who DVD Files (issue 109) in March 2013. Paddy Kingsland andReferences
External links
*Target novelisation
* {{K9 stories, selected=Television Fourth Doctor serials Doctor Who serials novelised by Terrance Dicks 1980 British television episodes