Demons from 1x04 were created by Sol for Destined, a Spin Off of the tv hit series Charmed.
Those demons were haunted by Chris. Chris was trying to figure out what to do when his girlfriend Andrea told him she was returning to San Francisco so he decided to hunt demons. Chris thought he could handle them alone. However, he realized it vanquish them was not that easy because whenever you kill one, two more show up. By the end of Twins Troubles, Chris asked for Junior´s help to vanquish them using two different potions, one to stop them to multiply and the other one a vanquishing potion.
Notes & Trivia
Those demons appear in a total of 1 episode.