Animus

The Animus was an alien intelligence from an unknown planet which landed on the planet Vortis. It could take over any living creature that was in contact with gold and had already taken control of the ant-like Zarbi when the Doctor and his companions arrived on Vortis in the serial The Web Planet. One of Vortis' surviving lifeforms, the Optera, referred to the Animus as "Pwodarauk". The Animus manifested itself within an organic, self-healing palace called the Carcinome.At the end of the story, the Animus's true form was revealed, as resembling an octopus with some arachnid features. The First Doctor, Ian, Barbara and Vicki help the Menoptra to destroy the Animus using the Menoptra's secret weapon, the Isop-tope. After that, it is...