Supernatural

Season 11, Episode 20

Episode Title: Don't Call Me Shurley

Air Date: 2016-05-04

Overview:

Amara unleashes a dark fog on a small town, causing everyone to go mad. Dean and Sam realize this is a stronger version of the original black vein virus Amara previously unleashed. They team up with the sheriff to protect the town but their old remedy no longer works. Meanwhile, Chuck returns with an interesting proposal.