Katrina Mills was Agent Liam’s ex-girlfriend. The couple had a child, Elizabeth Mills, who Mortis saved in the 31st century. Mills later turned against Liam and Mortis and attempted to destroy the Earth with the aid of the Zakatrons, but was killed by Liam.

Played by:
Laura Daykin (2.5-2.6)
Emma Crichton (3.5)

First Appearance:
2.5: The Nightmare Forest

Latest Appearance:
3.5: Sins of the Past

Total Episodes:
2.5-2.6. 3.5: 3 Episodes