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Professor Aaron Copley was a physician and scientist working at the Pharm in Wales. He captured alien species, and tried to create vaccines for human illnesses from them. He knew they were going to die but he needed to find a way to cure uncurable human illness and he used a species called the Mayfly. He also had a Weevil in containment.

He shot and killed Torchwood member Owen Harper and was shot in the head by Captain Jack moments later while threatening to shoot Martha Jones. To his death, he still maintained the fact that what he was doing would work out in the end and that he was close to a "breakthrough". (TV: Reset)