Supergirl Season 3 Episode 8
Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth’s mightiest heroes – Green Arrow, Supergirl, The Flash and White Canary – lead their teams into battle to save the world.
The crossover continues on Arrow S06E08 Crisis on Earth-X (II), The Flash S04E08 Crisis on Earth-X (III) and DC’s Legends of Tomorrow S03E08 Crisis on Earth-X (IV).
Director: Larry Teng
Guest Star: Andrea Pizarro, Anthony Ames, Caity Lotz, Candice Patton, Carlos Valdes, Chris Walters, Christina Brucato, Danielle Nicolet, Danielle Panabaker, Dominic Purcell, Emily Bett Rickards, Franz Drameh, Grant Gustin, Isabella Hofmann, Jay MacDougald, Jeremy Schuetze, Jesse L. Martin, Jessica Parker Kennedy, Keiynan Lonsdale, Luke Roessler, Mackenzie Gray, Patrick Sabongui, Paul Herbert, Robyn Bradley, Stephen Amell, Tom Cavanagh, Victor Garber, William Katt
Episode Title: Crisis on Earth-X (I)
Air Date: 2017-11-27