Trick or Treat Studios and Cartel Entertainment Gray Matter Mask from the hit television series Creepshow. Grey Matter is the first episode in the series, directed by Greg Nicotero. An adaptation of Stephan King's harrowing Night Shift short story, “ Gray Matter ”, tells an icy tale involving a troubled son, his alcoholic father, and a deadly case of beer. This amazing mask has all of the details of the incredible creature that is Grey Matter.