Decay was a creature that caused people to be in a state of decay. Mors Alexandryn called it a virus, and Smith Ridley was infected by it. The Seventh Doctor called it unstable. It was attracted to the Dar Traders. (AUDIO: The Death Collectors) Retrieved from "https://tardis.fandom.com/wiki/Decay?oldid=2794985" Categories: Viruses + cat Cancel Save Community content is available under CC-BY-SA unless otherwise noted.