Morgana is a major antagonist in the Doctor Who story "The Greatest Show in the Galaxy".
She was portrayed by Deborah Manship.
Morgana was a member of the Psychic Circus. After the circus came to Segonax and fell under the influence of the Gods of Ragnarok, Morgana somewhat reluctantly served them. She acted as the circus' fortune teller and also manned the ticket office. She objected to the harsh treatment of attempted escapee Bellboy and made a half-hearted attempt to warn the Doctor and Ace not to enter the tent, although she had little reluctance about sending the cloying super-fan Whizzkid to his death.
Morgana attempted to convince the Ringmaster of what the circus had become and that they would have to leave, but on being confronted by the eye that represented the Gods in her crystal ball, she asserted that those who remained at the circus were their servants to do with as they willed.
After the chaos of the Doctor and Mags' act and the death of Captain Cook, the Gods demanded further entertainment. As Morgana and the Ringmaster attempted to placate them, the Chief Clown had the clown robots bundle the pair into two large baskets from which they disappeared forever.