A PATIENT BAKES THE DOCTORS A SPECIAL TREAT, ON ABC'S 'GREY'S ANATOMY'

"Judgment Day" - During presentations on Grey Sloan Surgical Innovation Prototypes Day, Arizona shares some cookies from an appreciative patient that, unbeknownst to her, contain a special ingredient. Meanwhile, Catherine reveals some shocking details to Jackson about his grandfather's past; and Jo steps in mid-operation on a major surgery after Bailey and Meredith are down for the count, on "Grey's Anatomy," THURSDAY, APRIL 19 (8:00-9:00 p.m. EDT), on The ABC Television Network, streaming and on demand.

Guest starring are Debbie Allen as Catherine Avery, Stefania Spampinato as Carina Deluca, Alex Blue Davis as Casey Parker, Jake Borelli as Levi Schmitt, Rushi Kota as Vik Roy, Sophia Ali Taylor as Dahlia Quadri and Jaicy Elliot as Taryn Helm.

"Judgment Day" was written by Julie Wong and directed by Sydney Freeland.

"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, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Jo Wilson, Kelly McCreary as Maggie Pierce and Giacomo Gianniotti as Andrew DeLuca.

"Grey's Anatomy" was created and is executive produced by Shonda Rhimes ("Scandal," "How to Get Away with Murder"). Betsy Beers ("Scandal," "How to Get Away with Murder"), Mark Gordon ("Saving Private Ryan"), Krista Vernoff ("Shameless"), William Harper, Zoanne Clack, Debbie Allen and Fred Einesman are executive producers. "Grey's Anatomy" is produced by ABC Studios.

"Grey's Anatomy" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound. A parental guideline will be assigned to this program at a later date.