VIDEO: Sneak Peek - 666 PARK AVENUE's Halloween Episode on ABC

On this Sunday's episode of the new ABC drama 666 PARK AVENUE titled 'A Crowd of Demons" - as Olivia works to put the finishing touches on the lobby for the annual Drake Halloween costume gala, it brings to mind another memorable Halloween night in 1929, when murder and mayhem reigned in the building. However, now it's Jane who finds herself in the crosshairs of the spirit from the suitcase. Meanwhile, Gavin receives cryptic texts from an unknown source threatening Olivia's safety, and Henry meets a media consultant interested in propelling his political career. A jealous Brian questions Louise about her rendezvous with Dr. Evans while she was recovering from her elevator accident, and one of Gavin's most crucial personal possessions is missing by the end of the evening. The episode airs SUNDAY, OCTOBER 28 (10:01-11:00 p.m., ET), on the ABC Television Network. Get a sneak peek below!

"666 Park Avenue" stars Rachael Taylor as Jane Van Veen, DAVE ANNABLE as Henry Martin, Mercedes Masšhn as Louise Leonard, RoBert Buckley as BrIan Leonard, Helena Mattsson as Alexis Blume, ERIK PALLADINO as Tony DeMeo and Samantha Logan as Nona Clark, with Vanessa Williams as Olivia Doran and Terry O'Quinn as Gavin Doran.

Guest starring are Enrique Murciano as Dr. Scott Evans, Ursula Parker as little girl, Tessa Thompson as Laurel Harris, Heidi Armbruster as Connie Kramer, Jacqueline Hendy as Skyler Jones, Neimah Djourabchi as "Satan," William Youmans as Bill Atherton, Anastasia Barzee as Diane, Jim True-Frost as Peter Kramer, Christine Toy Johnson as Julie, Gabe Hernandez as detective, Dave Bachman as police sargeant and Doug Wert as "Gas Mask Man."

"A Crowd of Demons" was written by Sonny Postiglione and directed by Robbie Duncan McNeill.