Videos by ComicBook.com
The preview video, titled “Hospital Horror,” goes behind the scenes of the episode set to air Friday at 8 p.m. ET/PT.
You can it them out, along with the episode’s official synopsis, below.
AN ANCIENT EVIL RESURFACES IN A HOSPITAL – When John (Matt Ryan) heads to a local hospital to investigate a mysterious attack, he enlists an unwitting Manny (Harold Perrineau) to help him. Meanwhile, a health scare causes Zed (Angélica Celaya) to question the source of her visions. Charles Halford also stars.
