Creeps by Night is an American old-time radio horror program that aired on the Blue Network from February 15, 1944, to August 15, 1944. It was known for its chilling stories, many of which featured famous horror actors like Boris Karloff and Peter Lorre. "Those Who Walk in Darkness" is an episode that typically involves eerie tales that explore themes of supernatural and psychological horror, often culminating in suspenseful climaxes.