We are discussing Season 1, Episode 4 of Supernatural "Phantom Traveler" in which we get our introduction to black-eyed demons! We talk about what is the proper plane etiquette when you are possessed and whether or not airlines will issue a voucher for Demons. The lore focuses on the most famous case of mass exorcism "The Devils of Loudon" aka yoga nuns aka the old times, when priests banged and fought in Church.

Sources: 

https://vimeo.com/14581423 “Zabulon, the Lord of Hell” http://www.supernaturalwiki.com/The_Ackles_Ass_Equation https://web.archive.org/web/20130227154620/https://entirelyjensen.livejournal.com/451397.html

http://numerology.center/biblical_numbers_number_40.php

https://en.wikipedia.org/wiki/Eastern_Air_Lines_Flight_401

http://www.supernaturalwiki.com/Exorcism

https://en.wikipedia.org/wiki/Urbain_Grandier

https://www.questia.com/library/journal/1G1-189052346/a-jesuit-mystic-s-feminine-melancholia-jean-joseph)

https://www.youtube.com/watch?v=dApwLJVI_e4

A Case of Witchcraft: The Trial of Urbain Grandier by Robert Rapley · 1998 

The Penguin book of Exorcisms (editor Dr. Joseph Laycock

The Encyclopedia of Demons & Demonology Rosemary Ellen Guiley 

Encyclopedia of demons in world religions and cultures by Theresa Bane