Kate Maguire

Kate Maguire was a companion of the Tenth Doctor, she was a reporter who went undercover into the Hyperville complex.

First meeting the Doctor
When Kate went to school in the year 2009 she bunked of with her friend Lisa and went to Hyperville. She met the Doctor who gave her a Hyperville card as she would need it in the future. (NSA: Autonomy)

That was from the Doctors future prospective

Second time meeting the Doctor
In 2013 Kate had become a Journalist. Having heard of strange occurrences in Hyperville she went there undercover as an employee of Max Carson who ran it. She encountered the Doctor and assisted him in defeating the Autons the aliens that where behind these occurrences. She and the Doctor, with the help of some others, eventually defeated the Autons. After this had happened the Doctor departed to go on his adventures. (NSA: Autonomy)