Caitlin Peters
From Tardis Wiki, the free Doctor Who reference
Caitlin Peters studied the Ambression Cave Painting Exhibit that was in the Braxiatel Collection. She disappeared in the mountains of Karthos on an expedition to the mountains. She was capture by the firefires and and became a host for them. She tried to use the fireflies to create more fireflies so that her husband, Michael Peters could bring better profits. (AUDIO: The Skymines of Karthos)
