Grey's Anatomy 14x20 "Judgment Day" Season 14 Episode 20 Promo - 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 19th on ABC, streaming and on demand.