Alison was Stephen Hart's girlfriend, who, circa 2004 - 2005, went to the Amazon Rainforest to research infectious tropical diseases, before returning to the United Kingdom after two years.

Shortly after returning to the UK, Alison picked Stephen up from hospital after Stephen had fully recovered from his Arthropleura bite. Stephen later claimed that Alison was jet-lagged from her return to Britain, and that they were now much more distant and didn't know each other as well as they used to. (Episode 1.3) It is unknown what became of her afterwards or if she even attended Stephen's funeral, though it was implied they split up soon after her return to the UK. (Episode 1.3, 2.7)

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