Evolution – Season 39, Story 4
While travelling to the Eye of Orion, the Doctor and his companions encounter a powerful telepathic field that tears the TARDIS from the Time Vortex. Crash landing on the planet Satrigon in the year 3450, the Doctor discovers that the primitive species he once knew has become an advanced military civilisation, in just over 200 years.
The Doctor, Val and Tom investigate claims that gods have advanced the species and learn that the population regularly experience psychic communication with these mysterious deities known collectively as The Colony.
When the time travellers begin to experience these events for themselves, the Doctor and his companions become caught in a race against time to find out what is accelerating the evolutionary rate of the Satrigorns—before worlds are destroyed and the lines between reality and illusion are dissolved permanently.
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