Jennifer Huxley

 was the daughter of Agatha Fernbridge. She had recently been jilted by her husband. She showed the Fifth Doctor the dead body of her brother who was also called the Doctor. (AUDIO: Towards Zero)

The Doctor would eventually discover that Jennifer, along with many other people throughout history who looked like her, were caused by a group of Time War Daleks who — while on a mission to prevent the rise of Time Lord society on Gallifrey — created a time distortion which created alternate versions of themselves as four un-mutated Kaled people. This time distortion also caused multiple copies of these four Kaleds to appear at various points throughout time and space. (AUDIO: Effect and Cause)