Hazel Trahn was on Earth at the time of the Cyberman incursion in the early 26th century. She was stopped at a checkpoint, to check her ID. She thought the androids were to blame, for the bad things that occurred. On the way to her sister's, her car was immobilised after a terrorist incident. On escaping the Cybermen, she was attacked by the Cybermats, but saved by Yan. (AUDIO: Outsiders)
She could drive a Hovercraft and took the resistance to Bergen, where they thought that was the centre of Cyber-conversion. (AUDIO: Terror)
She saw half-converted Cybermen, and she was horrified at them. (AUDIO: Machines) She helped Samantha Thorn destroy the Cybermen, and met her Cybernised sister. (AUDIO: Extinction)