TAIA (Pronounced Tie-Ah) also known as the Temporal Anomaly Intervention Agency, was the inevitable result of the invention of the concept of time travel.
Every person, rock, tree, insect, animal and microbe has its timeline. And, like any organism or crystal, the world-line is made up of the individual timelines.
The agency tends the world-line, pruning the chaos, ensuring integrity and health.
However, there are humans involved. And some humans are anarchic by nature. And an anarchic human, with a time machine, is an especially dangerous thing.
Elizabeth, now with her deceased duplicate's memories, was very angry.