Kate Stewart

Kate Stewart, born Kate Lethbridge-Stewart and nicknamed "Tiger" by her father, was the daughter of Alistair Gordon Lethbridge-Stewart and his first wife, Fiona. (PROSE: The Scales of Injustice)

Biography
Fiona and Alistair had Kate three years into their eight year marriage.

As a child, Kate was never told of her father's work at UNIT with aliens. She was only told that he was a military man. She would often pretend that he was off to have an amazing adventure when really she knew he was off to do boring military operations. She grew estranged from her father, though they re-united in 1997. (HOMEVID: Downtime) At the time of the Wenley Moor Silurian incident Kate was five years old. (PROSE: The Scales of Injustice) Alistair realised that the secretive nature of his work with UNIT prevented him from being the kind of stable and open father that she deserved. His long absences from home caused Fiona to leave him. Alistair guessed that she and Kate went off to at least initially live somewhere close to Chichester, the home of Kate's maternal grandparents. (PROSE: The Scales of Injustice)

Kate was the mother of Gordon Lethbridge-Stewart. She ended up estranged from her father, though they re-united circa 1997. (HOMEVID: Downtime)

In 2004, Kate encountered Mastho, one of the last Daemons. (HOMEVID: Dæmos Rising)

Later, Kate had dropped the name "Lethbridge" when she became the head of scientific research to UNIT so as to avoid favours. (TV:  The Power of Three)

Behind the scenes
Kate Stewart was created by Marc Platt for the direct-to-video story, , released in 1995. Her early life was chronicled the next year by Gary Russell in 'The Scales of Injustice, and Chris Chibnall then showed audiences about her middle-aged life in The Power of Three'', almost twenty years after she was created.