Joe, also known as Patient X, is a mortal who was once part of an experiment using demonic blood on humans in an attempt to create powerful soldiers. He proved to be immune and his blood was later revealed to be the only cure when the failed experiment turned into a deadly virus.
When Billie Jenkins was infected with a deadly virus, the Charmed Ones confronted Agent Murphy and learned the true origin of the virus. In order to locate Patient X, they infected themselves with the virus to enhance their powers in order to scry for Joe, as only his blood could cure it.
When they found Joe, he was attacked by Margoyle and his gang, though the Charmed Ones vanquished them with their brute strength. However, Margoyle himself managed to obtain Joe's blood and escaped. The sisters then used his blood to cure Billie and themselves, while The Elders used it to cure all magical beings infected.
Joe appeared in a total of 1 episode over the course of the series.
- Season 8
- Hulkus Pocus