HALLOWEEN IN SEATTLE DOESN'T GO AS PLANNED FOR DOCTORS AT GREY SLOAN OR PAC-GEN NORTH ON AN ALL-NEW EPISODE OF ABC'S 'GREY'S ANATOMY,' THURSDAY, OCT. 31

"Whistlin' Past the Graveyard" - Alex is hoping to impress investors at Pac-Gen North, but when he hears disturbing news about skeletons on the construction site grounds, he enlists Richard to help with distraction tactics. Teddy feels the pressure to be super-mom after tasking herself with creating original Halloween costumes for Allison and Leo, while Meredith fears she won't make it home in time for trick-or-treating with her kids. Elsewhere, Jackson tends to a pediatric patient who is upset she is spending her Halloween in a hospital on "Grey's Anatomy," THURSDAY, OCT. 31 (8:00-9:01 p.m. EDT), on ABC. Episodes can also be viewed the next day on ABC.com, the ABC app and Hulu.

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens Jr. as Richard Webber, Kevin McKidd as Owen Hunt, Jesse Williams as Jackson Avery, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Jo Wilson, Kelly McCreary as Maggie Pierce, Kim Raver as Teddy Altman, Giacomo Gianniotti as Andrew DeLuca, Greg Germann as Tom Koracick, Chris Carmack as Atticus "Link" Lincoln and Jake Borelli as Levi Schmitt.

Guest starring is Alex Landi as Nico Kim, Jaicy Elliot as Taryn Helm and Isadora Goreshter as Paula.

"Whistlin' Past the Graveyard" was written by Julie Wong and directed by Pete Chatmon.

"Grey's Anatomy" was created and is executive produced by Shonda Rhimes. Betsy Beers, Mark Gordon, Krista Vernoff, Debbie Allen, Zoanne Clack, Fred Einesman, Andy Reaser and Meg Marinis are executive producers. "Grey's Anatomy" is produced by ABC Studios. ABC Studios is a part of Disney Television Studios, a collection of studios comprised of 20th Century Fox Television, ABC Studios and Fox 21 Television Studios.

A TV parental guideline will be assigned to this program at a later date.