- You may be looking for the anthology Short Trips: Zodiac.
The Zodiac formed an integral part of astrology on the many planets where sentient beings practised this art. It resembled a wheel, with beings of different birthdates having a different place on that wheel depending on the influence of the stars and/or planets. Humans and Draconians each used Zodiac signs in their astrology, as did the inhabitants of the planet Ventiplex. (TV: Secrets of the Stars)
According to the Fourth Doctor, the last sign of the Zodiac was Pisces. (AUDIO: Doctor Who and the Pescatons) The Second Doctor mentioned Aquarius, Aries, Taurus and Gemini while pretending to use astrological criteria as a physician. (TV: The Highlanders)