An inhabitant of the planet Vulpana, who was travelling companion to the famous intergalactic explorer Captain Cook. The Doctor and his own companion, Ace, encountered the pair on the planet Segonax, where the Psychic Circus had settled. The Doctor could not understand why Mags remained with the Captain, who was a well-known bore, and suspected that he might have some hold over her.
It transpired that her people were lycanthropes. Sight of the moon - even an image of one - could be enough to trigger the metamorphosis - turning her into a savage beast. Cook attempted to use this against the Doctor, using a circus lighting effect to transform her so she would attack him. However, she turned on her companion instead and killed him.
The circus had been taken over by the evil Gods of Ragnarok for their own private entertainment. After they had been defeated, Mags elected to stay on and help relaunch the circus with its one-time leader Kingpin. The Doctor had convinced her that she could control her transformations.
Played by: Jessica Martin. Appearances: The Greatest Show in the Galaxy (1988).
- Impressionist Martin later voiced Queen Elizabeth II in Voyage of the Damned.