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Crisis on Earth-X (II)

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 starts on Supergirl S03E08 Crisis on Earth X (I). It continues on The Flash S04E08 Crisis on Earth-X (III) and DC's Legends of Tomorrow S03E08 Crisis on Earth X (IV).
Aired: Nov 27, 2017 Genre: Crime Drama Action & AdventureCasts: Stephen Amell Rick Gonzalez David Ramsey Juliana Harkavy Willa Holland Emily Bett Rickards Paul Blackthorne Echo KellumCreated By: Greg Berlanti Marc Guggenheim Andrew KreisbergProducers: James BamfordRating: 3.7 Country: United States of America Production: Berlanti Productions, DC Entertainment, Warner Bros. Television