Unmarked Purlieus

The Unmarked Purlieus was an uncharted Star System at the very edge of reality that the Thirteenth Doctor travelled to with her friends. She had heard rumours of there being life there and "the most extraordinary singing sunsets" however ultimately believed it to be "lovely" but a "little bit overrated". It is here that the Psychic Virus encountered the Doctor, followed her back and started to infect everyone on Earth who had knowledge of her. (AUDIO: Salvation)