DC's Legends of Tomorrow 4x16 "Hey, World" Season 4 Episode 16 Promo Trailer (Season Finale) - SEASON FINALE — While on a mission to find Ray (Brandon Routh), Constantine (Matt Ryan) and Nora (Courtney Ford) discover Neron’s evil plan. Nate (Nick Zano) convinces the Legends to think outside the box and suggests a dangerous plan to unite magical creatures and people to save the world. Caity Lotz, Dominic Purcell, Maisie Richardson-Sellers, Tala Ashe, Jes Macallan and Ramona Young also star. Kevin Mock directed the episode written by Phil Klemmer & Keto Shimizu (#416). Original airdate 5/20/2019.