The High Priestesses of the Old Religion are the main servants of the Triple Goddess. This deity was first mentioned by Alator of the Catha in the episode "The Secret Sharer", when he called Morgana "High Priestess of the Triple Goddess, and last of your kind". The Triple Goddess was also mentioned in the episode The Diamond of the Day: Part One when Gaius told Merlin that the Gean Canach had been forged by the tears of the Earth Mother Nemaine.