Nona

Fidi is aimlessly hitchhiking on a snowy winter's night and ends up being seduced by Nona into murdering several innocent bystanders.

Doctor Who: The Moonbase

The TARDIS arrives in 2070 on the Moon, where a weather control station under the command of a man named Hobson is in the grip of a plague epidemic — in reality the result of an alien poison planted by the Cybermen. Jamie is knocked unconscious and lapses into a delirium, leaving the Second Doctor, Ben, and Polly to fight off a massive Cyberman attack.