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Name – Xeraphin
Species – higher intelligence
Planet – Xeriphas
Temperament – desperate
Appearances – Time-Flight

The Xeraphin came from Xeriphas. They were among the most highly developed intelligences in the universe, gifted with great mental powers. Their planet was devastated in the crossfire of the war between the Vardon and Kosnax. Injured by radiation sickness, their entire race physically amalgamated into one intelligence, which planned to rest until the contamination was passed, then regenerate. The Xeraphin travelled to Jurassic Earth to build a new home. There, they met the Master who, disguised as Kalid, used their evil side (personified by Zarak) to incorporate them in his TARDIS. Prof. Hayter sacrificed himself by joining the Xeraphin, to enable their good side, Anithon, to communicate with the Doctor. The Doctor secretly reprogrammed the Master's TARDIS to send the Xeraphin back to a future Xeriphas, which was free of radiation. They regenerated and went on with their lives.