Superstore The staff finds a body in the store on Halloween, prompting a variety of reactions from workers and customers. 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. Grey's Anatomy A flashback to war-torn 2007 Iraq fills in some important blanks about events leading up to the kidnapping of Megan (Abigail Spencer), Owen's (Kevin McKidd) younger sister, who had been missing for 10 years. Gotham Gordon and Bullock (Ben McKenzie, Donal Logue) pursue a serial killer who has been murdering cops. The Good Place Michael (Ted Danson) needs Janet's (D'Arcy Carden) help to determine the cause of a new glitch before it gets out of control.