Alison Foster

Alison Foster was a doctor aboard Space Dock Nerva. She had decided to "make a difference" by going into space after the death of her child, Claire, who had lived for seven days. She met the Fourth Doctor and Leela after Nerva became infected by a virus. They left together with Giles Moreau aboard the Chandler, but were forced to abandon the craft in spacesuits as Moreau had been infected. Foster, the Doctor and Leela were teleported by the Drellerans who revealed the virus was their design. They had suffered under Jack Corrigan and wanted to destroy humanity. Foster argued that her species had changed in the thousands of years since Corrigan's time, and the Doctor and Leela corroborated this. The Drellerans injected them with an anti-virus and returned them to Nerva. When they made contact with the infected, the virus was destroyed. (AUDIO: Destination: Nerva)