Superstore The staff finds a body in the store on Halloween, prompting a variety of reactions from workers and customers. America Ferrera and Ben Feldman star. 8 p.m. NBC
Supernatural Loretta Devine returns in her guest role as a psychic from Kansas, who turns to Sam and Dean (Jared Padalecki, Jensen Ackles) for help after a wraith (guest star Jon Cor) murders one of her friends and may be targeting her granddaughter (guest star Clark Backo), who shares her gifts. 8 p.m. KTLA
Grey's Anatomy A flashback to war-torn 2007 Iraq fills in some important blanks about events leading up to the kidnapping of Megan...