Sam and Dean have dealt with interesting objects and beings that can kill on SUPERNATURAL, but an upcoming episode may be the first time someone has died thanks to music on the show.

In the late January episode, titled “Into the Mystic”, Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a case where people (presumably in a retirement home from the looks of the photos below) are suffering violent deaths after hearing a mysterious song. Could the song itself be killing people? Is there a curse attached to it? Or are people summoning a creature via this song that’s actually killing them?

This concept isn’t new. You have something simliar with the film THE RING (and the earlier Japanese stories it is based on), which featured people dying after watching a mysterious and horrifying videotape. More recently, a fictional podcast named “The Black Tapes” had an episode focused on “the Unsound” — a demonic sound that would kill anyone who was exposed to it within a year (and was presumably used to summon demons into the world). In the podcast, a musician was layering the Unsound into his musical tracks so that it could not easily be heard, but was definitely present. Could something similar be happening here?

Meanwhile, Castiel made the reckless decision to become Lucifer’s vessel in the previous episode (read our recap) and now he’s pretending he’s still regular-old-Castiel around the Winchesters — but they’re starting to get suspicious about his behavior.

Browse through photos below for the January 27 episode of SUPERNATURAL airing at 9:00 p.m. ET/PT on The CW.