Key to Time

The Key to Time A powerful and mythic artefact with which The Guardians of Time used to maintain control over order and chaos. It's shape was that of a perfect, crystal-like cude. When the balance was upset, The White Guardian enlisted the help of the The Fourth Doctor and Romana to gather the Key's six segments, which were disguised as: A lump of jethrik taken to Ribos by Garron The Ribos Operation, The planet Calufrax, shrunk to football size by the planet Zanak The Pirate Planet, the former Great Seal of Diplos, kept in the form of a necklace on Earth The Stones of Blood, a Taran statue The Androids of Tara, a holy relic of the Swampies swallowed by Kroll on a Delta Magna moon The Power of Kroll, and Princess Astra of Atrios The Armageddon Factor. The Black Guardian used the Shadow to stop the Fourth Doctor from obtaining the sixth segment. After The Doctor defeated the Shadow, he assembled The Key and outwitted The Black Guardian, enabling The White Guardian to restore universal balance. The Key of Time was then broken apart and scattered throughout the universe again, persumably assuming five new shapes and restoring Princess Astra to her natural form.